diff --git a/index.js b/index.js
index ab487080..db520b9d 100644
--- a/index.js
+++ b/index.js
@@ -226,6 +226,28 @@ class Encore {
         return this;
     }
 
+    /**
+     * Allows you to configure the options passed to the optimize-css-assets-webpack-plugin.
+     * A list of available options can be found at https://github.com/NMFR/optimize-css-assets-webpack-plugin
+     *
+     * For example:
+     *
+     *      Encore.configureOptimizeCssPlugin((options) => {
+     *          options.cssProcessor = require('cssnano');
+     *          options.cssProcessorPluginOptions = {
+     *              preset: ['default', { discardComments: { removeAll: true } }],
+     *          }
+     *      })
+     *
+     * @param {function} optimizeCssPluginOptionsCallback
+     * @returns {Encore}
+     */
+    configureOptimizeCssPlugin(optimizeCssPluginOptionsCallback = () => {}) {
+        webpackConfig.configureOptimizeCssPlugin(optimizeCssPluginOptionsCallback);
+
+        return this;
+    }
+
     /**
      * Adds a JavaScript file that should be webpacked:
      *
diff --git a/lib/WebpackConfig.js b/lib/WebpackConfig.js
index 25aaecdd..02511657 100644
--- a/lib/WebpackConfig.js
+++ b/lib/WebpackConfig.js
@@ -110,6 +110,7 @@ class WebpackConfig {
         this.loaderOptionsPluginOptionsCallback = () => {};
         this.manifestPluginOptionsCallback = () => {};
         this.terserPluginOptionsCallback = () => {};
+        this.optimizeCssPluginOptionsCallback = () => {};
         this.notifierPluginOptionsCallback = () => {};
     }
 
@@ -217,6 +218,14 @@ class WebpackConfig {
         this.terserPluginOptionsCallback = terserPluginOptionsCallback;
     }
 
+    configureOptimizeCssPlugin(optimizeCssPluginOptionsCallback = () => {}) {
+        if (typeof optimizeCssPluginOptionsCallback !== 'function') {
+            throw new Error('Argument 1 to configureOptimizeCssPlugin() must be a callback function');
+        }
+
+        this.optimizeCssPluginOptionsCallback = optimizeCssPluginOptionsCallback;
+    }
+
     /**
      * Returns the value that should be used as the publicPath,
      * which can be overridden by enabling the webpackDevServer
diff --git a/lib/config-generator.js b/lib/config-generator.js
index 613ed6a0..87ed99e8 100644
--- a/lib/config-generator.js
+++ b/lib/config-generator.js
@@ -33,6 +33,7 @@ const variableProviderPluginUtil = require('./plugins/variable-provider');
 const cleanPluginUtil = require('./plugins/clean');
 const definePluginUtil = require('./plugins/define');
 const terserPluginUtil = require('./plugins/terser');
+const optimizeCssAssetsUtil = require('./plugins/optimize-css-assets');
 const vuePluginUtil = require('./plugins/vue');
 const friendlyErrorPluginUtil = require('./plugins/friendly-errors');
 const assetOutputDisplay = require('./plugins/asset-output-display');
@@ -388,7 +389,8 @@ class ConfigGenerator {
 
         if (this.webpackConfig.isProduction()) {
             optimization.minimizer = [
-                terserPluginUtil(this.webpackConfig)
+                terserPluginUtil(this.webpackConfig),
+                optimizeCssAssetsUtil(this.webpackConfig)
             ];
         } else {
             // see versioning.js: this gives us friendly module names,
diff --git a/lib/plugins/optimize-css-assets.js b/lib/plugins/optimize-css-assets.js
new file mode 100644
index 00000000..8c30adf8
--- /dev/null
+++ b/lib/plugins/optimize-css-assets.js
@@ -0,0 +1,37 @@
+/*
+ * This file is part of the Symfony Webpack Encore package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+'use strict';
+
+const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
+const applyOptionsCallback = require('../utils/apply-options-callback');
+
+/**
+ * @param {WebpackConfig} webpackConfig
+ * @return {object}
+ */
+module.exports = function(webpackConfig) {
+    const optimizePluginOptions = {
+        // see: https://github.com/NMFR/optimize-css-assets-webpack-plugin/issues/53#issuecomment-400294569
+        // we always use annotations: true, which is the setting if you're
+        // outputting to a separate file because this plugin is only
+        // used in production, and, in production, we always use the
+        // source-map option (a separate file) in config-generator.
+        cssProcessorOptions: {
+            map: {
+                inline: false,
+                annotation: true,
+            }
+        }
+    };
+
+    return new OptimizeCSSAssetsPlugin(
+        applyOptionsCallback(webpackConfig.optimizeCssPluginOptionsCallback, optimizePluginOptions)
+    );
+};
diff --git a/lib/webpack/delete-unused-entries-js-plugin.js b/lib/webpack/delete-unused-entries-js-plugin.js
index b0e5ad1d..a8498b50 100644
--- a/lib/webpack/delete-unused-entries-js-plugin.js
+++ b/lib/webpack/delete-unused-entries-js-plugin.js
@@ -22,7 +22,9 @@ DeleteUnusedEntriesJSPlugin.prototype.apply = function(compiler) {
                 let fileDeleteCount = 0;
 
                 // loop over the output files and find the 1 that ends in .js
-                chunk.files.forEach((filename) => {
+                // loop in reverse, to avoid issues as we remove items from chunk.files
+                for (let i = chunk.files.length - 1; i >= 0; --i) {
+                    let filename = chunk.files[i];
                     if (/\.js(\.map)?(\?[^.]*)?$/.test(filename)) {
                         fileDeleteCount++;
                         // remove the output file
@@ -30,7 +32,7 @@ DeleteUnusedEntriesJSPlugin.prototype.apply = function(compiler) {
                         // remove the file, so that it does not dump in the manifest
                         chunk.files.splice(chunk.files.indexOf(filename), 1);
                     }
-                });
+                }
 
                 // sanity check: make sure 1 or 2 files were deleted
                 // if there's some edge case where more .js files
diff --git a/package.json b/package.json
index c5c025d4..5be8744e 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "babel-loader": "^8.0.0",
     "chalk": "^2.4.1",
     "clean-webpack-plugin": "^0.1.19",
-    "css-loader": "^0.28.10",
+    "css-loader": "^1.0.0",
     "fast-levenshtein": "^2.0.6",
     "file-loader": "^1.1.10",
     "friendly-errors-webpack-plugin": "^1.7.0",
@@ -40,6 +40,7 @@
     "loader-utils": "^1.1.0",
     "lodash": ">=3.5 <5",
     "mini-css-extract-plugin": ">=0.4.0 <0.4.3",
+    "optimize-css-assets-webpack-plugin": "^5.0.1",
     "pkg-up": "^1.0.0",
     "pretty-error": "^2.1.1",
     "resolve-url-loader": "^2.3.0",
@@ -82,7 +83,7 @@
     "sinon": "^2.3.4",
     "stylus": "^0.54.5",
     "stylus-loader": "^3.0.2",
-    "ts-loader": "^4.3.0",
+    "ts-loader": "^5.3.0",
     "typescript": "^2.3.4",
     "url-loader": "^1.0.1",
     "vue": "^2.3.4",
diff --git a/test/WebpackConfig.js b/test/WebpackConfig.js
index 265721a9..4c6793fd 100644
--- a/test/WebpackConfig.js
+++ b/test/WebpackConfig.js
@@ -299,6 +299,24 @@ describe('WebpackConfig object', () => {
         });
     });
 
+    describe('configureOptimizeCssPlugin', () => {
+        it('Setting callback', () => {
+            const config = createConfig();
+            const callback = () => {};
+            config.configureOptimizeCssPlugin(callback);
+
+            expect(config.optimizeCssPluginOptionsCallback).to.equal(callback);
+        });
+
+        it('Setting invalid callback argument', () => {
+            const config = createConfig();
+
+            expect(() => {
+                config.configureOptimizeCssPlugin('foo');
+            }).to.throw('Argument 1 to configureOptimizeCssPlugin() must be a callback function');
+        });
+    });
+
     describe('addEntry', () => {
         it('Calling with a duplicate name throws an error', () => {
             const config = createConfig();
diff --git a/test/index.js b/test/index.js
index 3b39190e..0516c64f 100644
--- a/test/index.js
+++ b/test/index.js
@@ -405,6 +405,15 @@ describe('Public API', () => {
 
     });
 
+    describe('configureOptimizeCssPlugin', () => {
+
+        it('should return the API object', () => {
+            const returnedValue = api.configureOptimizeCssPlugin(() => {});
+            expect(returnedValue).to.equal(api);
+        });
+
+    });
+
     describe('Runtime environment proxy', () => {
         beforeEach(() => {
             api.clearRuntimeEnvironment();
diff --git a/yarn.lock b/yarn.lock
index 298b10c4..a775e4b8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1047,7 +1047,7 @@ align-text@^0.1.1, align-text@^0.1.3:
     longest "^1.0.1"
     repeat-string "^1.5.2"
 
-alphanum-sort@^1.0.1, alphanum-sort@^1.0.2:
+alphanum-sort@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/alphanum-sort/-/alphanum-sort-1.0.2.tgz#97a1119649b211ad33691d9f9f486a8ec9fbe0a3"
   integrity sha1-l6ERlkmyEa0zaR2fn0hqjsn74KM=
@@ -1289,18 +1289,6 @@ atob@^2.1.1:
   resolved "https://registry.yarnpkg.com/atob/-/atob-2.1.1.tgz#ae2d5a729477f289d60dd7f96a6314a22dd6c22a"
   integrity sha1-ri1acpR38onWDdf5amMUoi3Wwio=
 
-autoprefixer@^6.3.1:
-  version "6.7.7"
-  resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-6.7.7.tgz#1dbd1c835658e35ce3f9984099db00585c782014"
-  integrity sha1-Hb0cg1ZY41zj+ZhAmdsAWFx4IBQ=
-  dependencies:
-    browserslist "^1.7.6"
-    caniuse-db "^1.0.30000634"
-    normalize-range "^0.1.2"
-    num2fraction "^1.2.2"
-    postcss "^5.2.16"
-    postcss-value-parser "^3.2.3"
-
 autoprefixer@^8.5.0:
   version "8.6.5"
   resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-8.6.5.tgz#343f3d193ed568b3208e00117a1b96eb691d4ee9"
@@ -1371,11 +1359,6 @@ babylon@7.0.0-beta.44:
   resolved "https://registry.yarnpkg.com/babylon/-/babylon-7.0.0-beta.44.tgz#89159e15e6e30c5096e22d738d8c0af8a0e8ca1d"
   integrity sha512-5Hlm13BJVAioCHpImtFqNOF2H3ieTOHd0fmFGMxOJ9jgeFqeAwsv3u5P5cR7CSeFrkgHsT19DgFJkHV0/Mcd8g==
 
-balanced-match@^0.4.2:
-  version "0.4.2"
-  resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-0.4.2.tgz#cb3f3e3c732dc0f01ee70b403f302e61d7709838"
-  integrity sha1-yz8+PHMtwPAe5wtAPzAuYddwmDg=
-
 balanced-match@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
@@ -1473,7 +1456,7 @@ bonjour@^3.5.0:
     multicast-dns "^6.0.1"
     multicast-dns-service-types "^1.1.0"
 
-boolbase@~1.0.0:
+boolbase@^1.0.0, boolbase@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/boolbase/-/boolbase-1.0.0.tgz#68dff5fbe60c51eb37725ea9e3ed310dcc1e776e"
   integrity sha1-aN/1++YMUes3cl6p4+0xDcwed24=
@@ -1587,14 +1570,6 @@ browserify-zlib@^0.2.0:
   dependencies:
     pako "~1.0.5"
 
-browserslist@^1.3.6, browserslist@^1.5.2, browserslist@^1.7.6:
-  version "1.7.7"
-  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-1.7.7.tgz#0bd76704258be829b2398bb50e4b62d1a166b0b9"
-  integrity sha1-C9dnBCWL6CmyOYu1Dkti0aFmsLk=
-  dependencies:
-    caniuse-db "^1.0.30000639"
-    electron-to-chromium "^1.2.7"
-
 browserslist@^3.2.8:
   version "3.2.8"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-3.2.8.tgz#b0005361d6471f0f5952797a76fc985f1f978fc6"
@@ -1603,6 +1578,15 @@ browserslist@^3.2.8:
     caniuse-lite "^1.0.30000844"
     electron-to-chromium "^1.3.47"
 
+browserslist@^4.0.0:
+  version "4.3.4"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.3.4.tgz#4477b737db6a1b07077275b24791e680d4300425"
+  integrity sha512-u5iz+ijIMUlmV8blX82VGFrB9ecnUg5qEt55CMZ/YJEhha+d8qpBfOFuutJ6F/VKRXjZoD33b6uvarpPxcl3RA==
+  dependencies:
+    caniuse-lite "^1.0.30000899"
+    electron-to-chromium "^1.3.82"
+    node-releases "^1.0.1"
+
 browserslist@^4.1.0:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.1.1.tgz#328eb4ff1215b12df6589e9ab82f8adaa4fc8cd6"
@@ -1710,6 +1694,13 @@ call-me-maybe@^1.0.1:
   resolved "https://registry.yarnpkg.com/call-me-maybe/-/call-me-maybe-1.0.1.tgz#26d208ea89e37b5cbde60250a15f031c16a4d66b"
   integrity sha1-JtII6onje1y95gJQoV8DHBak1ms=
 
+caller-callsite@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/caller-callsite/-/caller-callsite-2.0.0.tgz#847e0fce0a223750a9a027c54b33731ad3154134"
+  integrity sha1-hH4PzgoiN1CpoCfFSzNzGtMVQTQ=
+  dependencies:
+    callsites "^2.0.0"
+
 caller-path@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/caller-path/-/caller-path-0.1.0.tgz#94085ef63581ecd3daa92444a8fe94e82577751f"
@@ -1717,11 +1708,23 @@ caller-path@^0.1.0:
   dependencies:
     callsites "^0.2.0"
 
+caller-path@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/caller-path/-/caller-path-2.0.0.tgz#468f83044e369ab2010fac5f06ceee15bb2cb1f4"
+  integrity sha1-Ro+DBE42mrIBD6xfBs7uFbsssfQ=
+  dependencies:
+    caller-callsite "^2.0.0"
+
 callsites@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/callsites/-/callsites-0.2.0.tgz#afab96262910a7f33c19a5775825c69f34e350ca"
   integrity sha1-r6uWJikQp/M8GaV3WCXGnzTjUMo=
 
+callsites@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/callsites/-/callsites-2.0.0.tgz#06eb84f00eea413da86affefacbffb36093b3c50"
+  integrity sha1-BuuE8A7qQT2oav/vrL/7Ngk7PFA=
+
 camelcase-keys@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/camelcase-keys/-/camelcase-keys-2.1.0.tgz#308beeaffdf28119051efa1d932213c91b8f92e7"
@@ -1755,20 +1758,20 @@ camelcase@^5.0.0:
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-5.0.0.tgz#03295527d58bd3cd4aa75363f35b2e8d97be2f42"
   integrity sha512-faqwZqnWxbxn+F1d399ygeamQNy3lPp/H9H6rNrqYh4FSVCtcY+3cub1MxA8o9mDd55mM8Aghuu/kuyYA6VTsA==
 
-caniuse-api@^1.5.2:
-  version "1.6.1"
-  resolved "https://registry.yarnpkg.com/caniuse-api/-/caniuse-api-1.6.1.tgz#b534e7c734c4f81ec5fbe8aca2ad24354b962c6c"
-  integrity sha1-tTTnxzTE+B7F++isoq0kNUuWLGw=
+caniuse-api@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/caniuse-api/-/caniuse-api-3.0.0.tgz#5e4d90e2274961d46291997df599e3ed008ee4c0"
+  integrity sha512-bsTwuIg/BZZK/vreVTYYbSWoe2F+71P7K5QGEX+pT250DZbfU1MQ5prOKpPR+LL6uWKK3KMwMCAS74QB3Um1uw==
   dependencies:
-    browserslist "^1.3.6"
-    caniuse-db "^1.0.30000529"
+    browserslist "^4.0.0"
+    caniuse-lite "^1.0.0"
     lodash.memoize "^4.1.2"
     lodash.uniq "^4.5.0"
 
-caniuse-db@^1.0.30000529, caniuse-db@^1.0.30000634, caniuse-db@^1.0.30000639:
-  version "1.0.30000865"
-  resolved "https://registry.yarnpkg.com/caniuse-db/-/caniuse-db-1.0.30000865.tgz#82ffb64d40f7567620aac02d3a632079689abc6b"
-  integrity sha1-gv+2TUD3VnYgqsAtOmMgeWiavGs=
+caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000899:
+  version "1.0.30000907"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000907.tgz#0b9899bde53fb1c30e214fb12402361e02ff5c42"
+  integrity sha512-No5sQ/OB2Nmka8MNOOM6nJx+Hxt6MQ6h7t7kgJFu9oTuwjykyKRSBP/+i/QAyFHxeHB+ddE0Da1CG5ihx9oehQ==
 
 caniuse-lite@^1.0.30000844, caniuse-lite@^1.0.30000864:
   version "1.0.30000865"
@@ -1901,13 +1904,6 @@ circular-json@^0.3.1:
   resolved "https://registry.yarnpkg.com/circular-json/-/circular-json-0.3.3.tgz#815c99ea84f6809529d2f45791bdf82711352d66"
   integrity sha512-UZK3NBx2Mca+b5LsG7bY183pHWt5Y1xts4P3Pz7ENTwGVnJOUWbRb3ocjvX7hx9tq/yTAdclXm9sZ38gNuem4A==
 
-clap@^1.0.9:
-  version "1.2.3"
-  resolved "https://registry.yarnpkg.com/clap/-/clap-1.2.3.tgz#4f36745b32008492557f46412d66d50cb99bce51"
-  integrity sha512-4CoL/A3hf90V3VIEjeuhSvlGFEHKzOz+Wfc2IVZc+FaUgU0ZQafJTP49fvnULipOPcAfqhyI2duwQyns6xqjYA==
-  dependencies:
-    chalk "^1.1.3"
-
 class-utils@^0.3.5:
   version "0.3.6"
   resolved "https://registry.yarnpkg.com/class-utils/-/class-utils-0.3.6.tgz#f93369ae8b9a7ce02fd41faad0ca83033190c463"
@@ -1974,11 +1970,6 @@ clone-deep@^2.0.1:
     kind-of "^6.0.0"
     shallow-clone "^1.0.0"
 
-clone@^1.0.2:
-  version "1.0.4"
-  resolved "https://registry.yarnpkg.com/clone/-/clone-1.0.4.tgz#da309cc263df15994c688ca902179ca3c7cd7c7e"
-  integrity sha1-2jCcwmPfFZlMaIypAheco8fNfH4=
-
 clone@^2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/clone/-/clone-2.1.1.tgz#d217d1e961118e3ac9a4b8bba3285553bf647cdb"
@@ -1989,10 +1980,10 @@ co@^4.6.0:
   resolved "https://registry.yarnpkg.com/co/-/co-4.6.0.tgz#6ea6bdf3d853ae54ccb8e47bfa0bf3f9031fb184"
   integrity sha1-bqa989hTrlTMuOR7+gvz+QMfsYQ=
 
-coa@~1.0.1:
-  version "1.0.4"
-  resolved "https://registry.yarnpkg.com/coa/-/coa-1.0.4.tgz#a9ef153660d6a86a8bdec0289a5c684d217432fd"
-  integrity sha1-qe8VNmDWqGqL3sAomlxoTSF0Mv0=
+coa@~2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/coa/-/coa-2.0.1.tgz#f3f8b0b15073e35d70263fb1042cb2c023db38af"
+  integrity sha512-5wfTTO8E2/ja4jFSxePXlG5nRu5bBtL/r1HCIpJW/lzT6yDtKl0u0Z4o/Vpz32IpKmBn7HerheEZQgA9N2DarQ==
   dependencies:
     q "^1.1.2"
 
@@ -2009,54 +2000,38 @@ collection-visit@^1.0.0:
     map-visit "^1.0.0"
     object-visit "^1.0.0"
 
-color-convert@^1.3.0:
-  version "1.9.2"
-  resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-1.9.2.tgz#49881b8fba67df12a96bdf3f56c0aab9e7913147"
-  integrity sha512-3NUJZdhMhcdPn8vJ9v2UQJoH0qqoGUkYTgFEPZaPjEtwmmKUfNV46zZmgB2M5M4DCEQHMaCfWHCxiBflLm04Tg==
-  dependencies:
-    color-name "1.1.1"
-
-color-convert@^1.9.0:
+color-convert@^1.9.0, color-convert@^1.9.1:
   version "1.9.3"
   resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-1.9.3.tgz#bb71850690e1f136567de629d2d5471deda4c1e8"
   integrity sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==
   dependencies:
     color-name "1.1.3"
 
-color-name@1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.1.tgz#4b1415304cf50028ea81643643bd82ea05803689"
-  integrity sha1-SxQVMEz1ACjqgWQ2Q72C6gWANok=
-
-color-name@1.1.3, color-name@^1.0.0:
+color-name@1.1.3:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.3.tgz#a7d0558bd89c42f795dd42328f740831ca53bc25"
   integrity sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=
 
-color-string@^0.3.0:
-  version "0.3.0"
-  resolved "https://registry.yarnpkg.com/color-string/-/color-string-0.3.0.tgz#27d46fb67025c5c2fa25993bfbf579e47841b991"
-  integrity sha1-J9RvtnAlxcL6JZk7+/V55HhBuZE=
-  dependencies:
-    color-name "^1.0.0"
+color-name@^1.0.0:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.4.tgz#c2a09a87acbde69543de6f63fa3995c826c536a2"
+  integrity sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==
 
-color@^0.11.0:
-  version "0.11.4"
-  resolved "https://registry.yarnpkg.com/color/-/color-0.11.4.tgz#6d7b5c74fb65e841cd48792ad1ed5e07b904d764"
-  integrity sha1-bXtcdPtl6EHNSHkq0e1eB7kE12Q=
+color-string@^1.5.2:
+  version "1.5.3"
+  resolved "https://registry.yarnpkg.com/color-string/-/color-string-1.5.3.tgz#c9bbc5f01b58b5492f3d6857459cb6590ce204cc"
+  integrity sha512-dC2C5qeWoYkxki5UAXapdjqO672AM4vZuPGRQfO8b5HKuKGBbKWpITyDYN7TOFKvRW7kOgAn3746clDBMDJyQw==
   dependencies:
-    clone "^1.0.2"
-    color-convert "^1.3.0"
-    color-string "^0.3.0"
+    color-name "^1.0.0"
+    simple-swizzle "^0.2.2"
 
-colormin@^1.0.5:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/colormin/-/colormin-1.1.2.tgz#ea2f7420a72b96881a38aae59ec124a6f7298133"
-  integrity sha1-6i90IKcrlogaOKrlnsEkpvcpgTM=
+color@^3.0.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/color/-/color-3.1.0.tgz#d8e9fb096732875774c84bf922815df0308d0ffc"
+  integrity sha512-CwyopLkuRYO5ei2EpzpIh6LqJMt6Mt+jZhO5VI5f/wJLZriXQE32/SSqzmrh+QB+AZT81Cj8yv+7zwToW8ahZg==
   dependencies:
-    color "^0.11.0"
-    css-color-names "0.0.4"
-    has "^1.0.1"
+    color-convert "^1.9.1"
+    color-string "^1.5.2"
 
 colors@1.0.3:
   version "1.0.3"
@@ -2250,6 +2225,16 @@ cosmiconfig@^4.0.0:
     parse-json "^4.0.0"
     require-from-string "^2.0.1"
 
+cosmiconfig@^5.0.0:
+  version "5.0.7"
+  resolved "https://registry.yarnpkg.com/cosmiconfig/-/cosmiconfig-5.0.7.tgz#39826b292ee0d78eda137dfa3173bd1c21a43b04"
+  integrity sha512-PcLqxTKiDmNT6pSpy4N6KtuPwb53W+2tzNvwOZw0WH9N6O0vLIBq0x8aj8Oj75ere4YcGi48bDFCL+3fRJdlNA==
+  dependencies:
+    import-fresh "^2.0.0"
+    is-directory "^0.3.1"
+    js-yaml "^3.9.0"
+    parse-json "^4.0.0"
+
 create-ecdh@^4.0.0:
   version "4.0.3"
   resolved "https://registry.yarnpkg.com/create-ecdh/-/create-ecdh-4.0.3.tgz#c9111b6f33045c4697f144787f9254cdc77c45ff"
@@ -2333,24 +2318,30 @@ crypto-browserify@^3.11.0:
     randombytes "^2.0.0"
     randomfill "^1.0.3"
 
-css-color-names@0.0.4:
+css-color-names@0.0.4, css-color-names@^0.0.4:
   version "0.0.4"
   resolved "https://registry.yarnpkg.com/css-color-names/-/css-color-names-0.0.4.tgz#808adc2e79cf84738069b646cb20ec27beb629e0"
   integrity sha1-gIrcLnnPhHOAabZGyyDsJ762KeA=
 
-css-loader@^0.28.10:
-  version "0.28.11"
-  resolved "https://registry.yarnpkg.com/css-loader/-/css-loader-0.28.11.tgz#c3f9864a700be2711bb5a2462b2389b1a392dab7"
-  integrity sha512-wovHgjAx8ZIMGSL8pTys7edA1ClmzxHeY6n/d97gg5odgsxEgKjULPR0viqyC+FWMCL9sfqoC/QCUBo62tLvPg==
+css-declaration-sorter@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/css-declaration-sorter/-/css-declaration-sorter-4.0.1.tgz#c198940f63a76d7e36c1e71018b001721054cb22"
+  integrity sha512-BcxQSKTSEEQUftYpBVnsH4SF05NTuBokb19/sBt6asXGKZ/6VP7PLG1CBCkFDYOnhXhPh0jMhO6xZ71oYHXHBA==
+  dependencies:
+    postcss "^7.0.1"
+    timsort "^0.3.0"
+
+css-loader@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/css-loader/-/css-loader-1.0.1.tgz#6885bb5233b35ec47b006057da01cc640b6b79fe"
+  integrity sha512-+ZHAZm/yqvJ2kDtPne3uX0C+Vr3Zn5jFn2N4HywtS5ujwvsVkyg0VArEXpl3BgczDA8anieki1FIzhchX4yrDw==
   dependencies:
     babel-code-frame "^6.26.0"
     css-selector-tokenizer "^0.7.0"
-    cssnano "^3.10.0"
     icss-utils "^2.1.0"
     loader-utils "^1.0.2"
-    lodash.camelcase "^4.3.0"
-    object-assign "^4.1.1"
-    postcss "^5.0.6"
+    lodash "^4.17.11"
+    postcss "^6.0.23"
     postcss-modules-extract-imports "^1.2.0"
     postcss-modules-local-by-default "^1.2.0"
     postcss-modules-scope "^1.1.0"
@@ -2363,6 +2354,11 @@ css-parse@1.7.x:
   resolved "https://registry.yarnpkg.com/css-parse/-/css-parse-1.7.0.tgz#321f6cf73782a6ff751111390fc05e2c657d8c9b"
   integrity sha1-Mh9s9zeCpv91ERE5D8BeLGV9jJs=
 
+css-select-base-adapter@~0.1.0:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/css-select-base-adapter/-/css-select-base-adapter-0.1.1.tgz#3b2ff4972cc362ab88561507a95408a1432135d7"
+  integrity sha512-jQVeeRG70QI08vSTwf1jHxp74JoZsr2XSgETae8/xC8ovSnL2WF87GTLO86Sbwdt2lK4Umg4HnnwMO4YF3Ce7w==
+
 css-select@^1.1.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/css-select/-/css-select-1.2.0.tgz#2b3a110539c5355f1cd8d314623e870b121ec858"
@@ -2373,6 +2369,16 @@ css-select@^1.1.0:
     domutils "1.5.1"
     nth-check "~1.0.1"
 
+css-select@^2.0.0:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/css-select/-/css-select-2.0.2.tgz#ab4386cec9e1f668855564b17c3733b43b2a5ede"
+  integrity sha512-dSpYaDVoWaELjvZ3mS6IKZM/y2PMPa/XYoEfYNZePL4U/XgyxZNroHEHReDx/d+VgXh9VbCTtFqLkFbmeqeaRQ==
+  dependencies:
+    boolbase "^1.0.0"
+    css-what "^2.1.2"
+    domutils "^1.7.0"
+    nth-check "^1.0.2"
+
 css-selector-tokenizer@^0.7.0:
   version "0.7.0"
   resolved "https://registry.yarnpkg.com/css-selector-tokenizer/-/css-selector-tokenizer-0.7.0.tgz#e6988474ae8c953477bf5e7efecfceccd9cf4c86"
@@ -2382,11 +2388,42 @@ css-selector-tokenizer@^0.7.0:
     fastparse "^1.1.1"
     regexpu-core "^1.0.0"
 
+css-tree@1.0.0-alpha.28:
+  version "1.0.0-alpha.28"
+  resolved "https://registry.yarnpkg.com/css-tree/-/css-tree-1.0.0-alpha.28.tgz#8e8968190d886c9477bc8d61e96f61af3f7ffa7f"
+  integrity sha512-joNNW1gCp3qFFzj4St6zk+Wh/NBv0vM5YbEreZk0SD4S23S+1xBKb6cLDg2uj4P4k/GUMlIm6cKIDqIG+vdt0w==
+  dependencies:
+    mdn-data "~1.1.0"
+    source-map "^0.5.3"
+
+css-tree@1.0.0-alpha.29:
+  version "1.0.0-alpha.29"
+  resolved "https://registry.yarnpkg.com/css-tree/-/css-tree-1.0.0-alpha.29.tgz#3fa9d4ef3142cbd1c301e7664c1f352bd82f5a39"
+  integrity sha512-sRNb1XydwkW9IOci6iB2xmy8IGCj6r/fr+JWitvJ2JxQRPzN3T4AGGVWCMlVmVwM1gtgALJRmGIlWv5ppnGGkg==
+  dependencies:
+    mdn-data "~1.1.0"
+    source-map "^0.5.3"
+
+css-unit-converter@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/css-unit-converter/-/css-unit-converter-1.1.1.tgz#d9b9281adcfd8ced935bdbaba83786897f64e996"
+  integrity sha1-2bkoGtz9jO2TW9urqDeGiX9k6ZY=
+
+css-url-regex@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/css-url-regex/-/css-url-regex-1.1.0.tgz#83834230cc9f74c457de59eebd1543feeb83b7ec"
+  integrity sha1-g4NCMMyfdMRX3lnuvRVD/uuDt+w=
+
 css-what@2.1:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/css-what/-/css-what-2.1.0.tgz#9467d032c38cfaefb9f2d79501253062f87fa1bd"
   integrity sha1-lGfQMsOM+u+58teVASUwYvh/ob0=
 
+css-what@^2.1.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/css-what/-/css-what-2.1.2.tgz#c0876d9d0480927d7d4920dcd72af3595649554d"
+  integrity sha512-wan8dMWQ0GUeF7DGEPVjhHemVW/vy6xUYmFzRY8RYqgA0JtXC9rJmbScBjqSu6dg9q0lwPQy6ZAmJVr3PPTvqQ==
+
 css@^2.0.0:
   version "2.2.3"
   resolved "https://registry.yarnpkg.com/css/-/css-2.2.3.tgz#f861f4ba61e79bedc962aa548e5780fd95cbc6be"
@@ -2402,51 +2439,85 @@ cssesc@^0.1.0:
   resolved "https://registry.yarnpkg.com/cssesc/-/cssesc-0.1.0.tgz#c814903e45623371a0477b40109aaafbeeaddbb4"
   integrity sha1-yBSQPkViM3GgR3tAEJqq++6t27Q=
 
-cssnano@^3.10.0:
-  version "3.10.0"
-  resolved "https://registry.yarnpkg.com/cssnano/-/cssnano-3.10.0.tgz#4f38f6cea2b9b17fa01490f23f1dc68ea65c1c38"
-  integrity sha1-Tzj2zqK5sX+gFJDyPx3GjqZcHDg=
+cssesc@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/cssesc/-/cssesc-2.0.0.tgz#3b13bd1bb1cb36e1bcb5a4dcd27f54c5dcb35703"
+  integrity sha512-MsCAG1z9lPdoO/IUMLSBWBSVxVtJ1395VGIQ+Fc2gNdkQ1hNDnQdw3YhA71WJCBW1vdwA0cAnk/DnW6bqoEUYg==
+
+cssnano-preset-default@^4.0.5:
+  version "4.0.5"
+  resolved "https://registry.yarnpkg.com/cssnano-preset-default/-/cssnano-preset-default-4.0.5.tgz#d1756c0259d98ad311e601ba76e95c60f6771ac1"
+  integrity sha512-f1uhya0ZAjPYtDD58QkBB0R+uYdzHPei7cDxJyQQIHt5acdhyGXaSXl2nDLzWHLwGFbZcHxQtkJS8mmNwnxTvw==
   dependencies:
-    autoprefixer "^6.3.1"
-    decamelize "^1.1.2"
-    defined "^1.0.0"
-    has "^1.0.1"
-    object-assign "^4.0.1"
-    postcss "^5.0.14"
-    postcss-calc "^5.2.0"
-    postcss-colormin "^2.1.8"
-    postcss-convert-values "^2.3.4"
-    postcss-discard-comments "^2.0.4"
-    postcss-discard-duplicates "^2.0.1"
-    postcss-discard-empty "^2.0.1"
-    postcss-discard-overridden "^0.1.1"
-    postcss-discard-unused "^2.2.1"
-    postcss-filter-plugins "^2.0.0"
-    postcss-merge-idents "^2.1.5"
-    postcss-merge-longhand "^2.0.1"
-    postcss-merge-rules "^2.0.3"
-    postcss-minify-font-values "^1.0.2"
-    postcss-minify-gradients "^1.0.1"
-    postcss-minify-params "^1.0.4"
-    postcss-minify-selectors "^2.0.4"
-    postcss-normalize-charset "^1.1.0"
-    postcss-normalize-url "^3.0.7"
-    postcss-ordered-values "^2.1.0"
-    postcss-reduce-idents "^2.2.2"
-    postcss-reduce-initial "^1.0.0"
-    postcss-reduce-transforms "^1.0.3"
-    postcss-svgo "^2.1.1"
-    postcss-unique-selectors "^2.0.2"
-    postcss-value-parser "^3.2.3"
-    postcss-zindex "^2.0.1"
+    css-declaration-sorter "^4.0.1"
+    cssnano-util-raw-cache "^4.0.1"
+    postcss "^7.0.0"
+    postcss-calc "^7.0.0"
+    postcss-colormin "^4.0.2"
+    postcss-convert-values "^4.0.1"
+    postcss-discard-comments "^4.0.1"
+    postcss-discard-duplicates "^4.0.2"
+    postcss-discard-empty "^4.0.1"
+    postcss-discard-overridden "^4.0.1"
+    postcss-merge-longhand "^4.0.9"
+    postcss-merge-rules "^4.0.2"
+    postcss-minify-font-values "^4.0.2"
+    postcss-minify-gradients "^4.0.1"
+    postcss-minify-params "^4.0.1"
+    postcss-minify-selectors "^4.0.1"
+    postcss-normalize-charset "^4.0.1"
+    postcss-normalize-display-values "^4.0.1"
+    postcss-normalize-positions "^4.0.1"
+    postcss-normalize-repeat-style "^4.0.1"
+    postcss-normalize-string "^4.0.1"
+    postcss-normalize-timing-functions "^4.0.1"
+    postcss-normalize-unicode "^4.0.1"
+    postcss-normalize-url "^4.0.1"
+    postcss-normalize-whitespace "^4.0.1"
+    postcss-ordered-values "^4.1.1"
+    postcss-reduce-initial "^4.0.2"
+    postcss-reduce-transforms "^4.0.1"
+    postcss-svgo "^4.0.1"
+    postcss-unique-selectors "^4.0.1"
+
+cssnano-util-get-arguments@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/cssnano-util-get-arguments/-/cssnano-util-get-arguments-4.0.0.tgz#ed3a08299f21d75741b20f3b81f194ed49cc150f"
+  integrity sha1-7ToIKZ8h11dBsg87gfGU7UnMFQ8=
 
-csso@~2.3.1:
-  version "2.3.2"
-  resolved "https://registry.yarnpkg.com/csso/-/csso-2.3.2.tgz#ddd52c587033f49e94b71fc55569f252e8ff5f85"
-  integrity sha1-3dUsWHAz9J6Utx/FVWnyUuj/X4U=
+cssnano-util-get-match@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/cssnano-util-get-match/-/cssnano-util-get-match-4.0.0.tgz#c0e4ca07f5386bb17ec5e52250b4f5961365156d"
+  integrity sha1-wOTKB/U4a7F+xeUiULT1lhNlFW0=
+
+cssnano-util-raw-cache@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/cssnano-util-raw-cache/-/cssnano-util-raw-cache-4.0.1.tgz#b26d5fd5f72a11dfe7a7846fb4c67260f96bf282"
+  integrity sha512-qLuYtWK2b2Dy55I8ZX3ky1Z16WYsx544Q0UWViebptpwn/xDBmog2TLg4f+DBMg1rJ6JDWtn96WHbOKDWt1WQA==
   dependencies:
-    clap "^1.0.9"
-    source-map "^0.5.3"
+    postcss "^7.0.0"
+
+cssnano-util-same-parent@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/cssnano-util-same-parent/-/cssnano-util-same-parent-4.0.1.tgz#574082fb2859d2db433855835d9a8456ea18bbf3"
+  integrity sha512-WcKx5OY+KoSIAxBW6UBBRay1U6vkYheCdjyVNDm85zt5K9mHoGOfsOsqIszfAqrQQFIIKgjh2+FDgIj/zsl21Q==
+
+cssnano@^4.1.0:
+  version "4.1.7"
+  resolved "https://registry.yarnpkg.com/cssnano/-/cssnano-4.1.7.tgz#0bf112294bec103ab5f68d3f805732c8325a0b1b"
+  integrity sha512-AiXL90l+MDuQmRNyypG2P7ux7K4XklxYzNNUd5HXZCNcH8/N9bHPcpN97v8tXgRVeFL/Ed8iP8mVmAAu0ZpT7A==
+  dependencies:
+    cosmiconfig "^5.0.0"
+    cssnano-preset-default "^4.0.5"
+    is-resolvable "^1.0.0"
+    postcss "^7.0.0"
+
+csso@^3.5.0:
+  version "3.5.1"
+  resolved "https://registry.yarnpkg.com/csso/-/csso-3.5.1.tgz#7b9eb8be61628973c1b261e169d2f024008e758b"
+  integrity sha512-vrqULLffYU1Q2tLdJvaCYbONStnfkfimRxXNaGjxMldI0C7JPBC4rB1RyjhfdZ4m1frm8pM9uRPKH3d2knZ8gg==
+  dependencies:
+    css-tree "1.0.0-alpha.29"
 
 cssom@0.3.x, "cssom@>= 0.3.0 < 0.4.0":
   version "0.3.4"
@@ -2586,11 +2657,6 @@ define-property@^2.0.2:
     is-descriptor "^1.0.2"
     isobject "^3.0.1"
 
-defined@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/defined/-/defined-1.0.0.tgz#c98d9bcef75674188e110969151199e39b1fa693"
-  integrity sha1-yY2bzvdWdBiOEQlpFRGZ45sfppM=
-
 del@^2.0.2:
   version "2.2.2"
   resolved "https://registry.yarnpkg.com/del/-/del-2.2.2.tgz#c12c981d067846c84bcaf862cff930d907ffd1a8"
@@ -2765,6 +2831,14 @@ domutils@1.5.1:
     dom-serializer "0"
     domelementtype "1"
 
+domutils@^1.7.0:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/domutils/-/domutils-1.7.0.tgz#56ea341e834e06e6748af7a1cb25da67ea9f8c2a"
+  integrity sha512-Lgd2XcJ/NjEw+7tFvfKxOzCYKZsdct5lczQ2ZaQY8Djz7pfAD3Gbp8ySJWtreII/vDlMVmxwa6pHmdxIYgttDg==
+  dependencies:
+    dom-serializer "0"
+    domelementtype "1"
+
 dot-prop@^4.1.1:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/dot-prop/-/dot-prop-4.2.0.tgz#1f19e0c2e1aa0e32797c49799f2837ac6af69c57"
@@ -2804,7 +2878,7 @@ ee-first@1.1.1:
   resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
   integrity sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0=
 
-electron-to-chromium@^1.2.7, electron-to-chromium@^1.3.47:
+electron-to-chromium@^1.3.47:
   version "1.3.52"
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.52.tgz#d2d9f1270ba4a3b967b831c40ef71fb4d9ab5ce0"
   integrity sha1-0tnxJwuko7lnuDHEDvcftNmrXOA=
@@ -2814,6 +2888,11 @@ electron-to-chromium@^1.3.62:
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.72.tgz#b69683081d5b7eee6e1ea07b2f5fa30b3c72252d"
   integrity sha512-OFbXEC01Lq7A66e3UywkvWYNN00HO1I9MAPereGe0NIXrt2MeaovL1bbY+951HKG0euUdPBe0L7yfKxgqxBMMw==
 
+electron-to-chromium@^1.3.82:
+  version "1.3.84"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.84.tgz#2e55df59e818f150a9f61b53471ebf4f0feecc65"
+  integrity sha512-IYhbzJYOopiTaNWMBp7RjbecUBsbnbDneOP86f3qvS0G0xfzwNSvMJpTrvi5/Y1gU7tg2NAgeg8a8rCYvW9Whw==
+
 elliptic@^6.0.0:
   version "6.4.0"
   resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.4.0.tgz#cac9af8762c85836187003c8dfe193e5e2eae5df"
@@ -2879,7 +2958,7 @@ error-stack-parser@^2.0.0:
   dependencies:
     stackframe "^1.0.4"
 
-es-abstract@^1.5.1, es-abstract@^1.7.0:
+es-abstract@^1.5.1, es-abstract@^1.6.1, es-abstract@^1.7.0:
   version "1.12.0"
   resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.12.0.tgz#9dbbdd27c6856f0001421ca18782d786bf8a6165"
   integrity sha512-C8Fx/0jFmV5IPoMOFPA9P9G5NtqW+4cOPit3MIuvR2t7Ag2K15EJTpxnHAYTzL+aYQJIESYeXZmDBfOBE1HcpA==
@@ -3092,11 +3171,6 @@ espree@^3.5.4:
     acorn "^5.5.0"
     acorn-jsx "^3.0.0"
 
-esprima@^2.6.0:
-  version "2.7.3"
-  resolved "https://registry.yarnpkg.com/esprima/-/esprima-2.7.3.tgz#96e3b70d5779f6ad49cd032673d1c312767ba581"
-  integrity sha1-luO3DVd59q1JzQMmc9HDEnZ7pYE=
-
 esprima@^3.1.3:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-3.1.3.tgz#fdca51cee6133895e3c88d535ce49dbff62a4633"
@@ -3471,11 +3545,6 @@ flat-cache@^1.2.1:
     graceful-fs "^4.1.2"
     write "^0.2.1"
 
-flatten@^1.0.2:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/flatten/-/flatten-1.0.2.tgz#dae46a9d78fbe25292258cc1e780a41d95c03782"
-  integrity sha1-2uRqnXj74lKSJYzB54CkHZXAN4I=
-
 flush-write-stream@^1.0.0:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/flush-write-stream/-/flush-write-stream-1.0.3.tgz#c5d586ef38af6097650b49bc41b55fabb19f35bd"
@@ -3660,7 +3729,7 @@ fstream@^1.0.0, fstream@^1.0.2:
     mkdirp ">=0.5 0"
     rimraf "2"
 
-function-bind@^1.1.1:
+function-bind@^1.1.0, function-bind@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"
   integrity sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A==
@@ -3965,7 +4034,7 @@ has-values@^1.0.0:
     is-number "^3.0.0"
     kind-of "^4.0.0"
 
-has@^1.0.1:
+has@^1.0.0, has@^1.0.1:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/has/-/has-1.0.3.tgz#722d7cbfc1f6aa8241f16dd814e011e1f41e8796"
   integrity sha512-f2dvO0VU6Oej7RkWJGrehjbzMAjFp5/VKPp5tTpWIV4JHHZK1/BxbFRtf/siA2SWTe09caDmVtYYzWEIbBS4zw==
@@ -4013,6 +4082,11 @@ he@^0.5.0:
   resolved "https://registry.yarnpkg.com/he/-/he-0.5.0.tgz#2c05ffaef90b68e860f3fd2b54ef580989277ee2"
   integrity sha1-LAX/rvkLaOhg8/0rVO9YCYknfuI=
 
+hex-color-regex@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/hex-color-regex/-/hex-color-regex-1.1.0.tgz#4c06fccb4602fe2602b3c93df82d7e7dbf1a8a8e"
+  integrity sha512-l9sfDFsuqtOqKDsQdqrMRk0U85RZc0RtOR9yPI7mRVOa4FsR/BVnZ0shmQRM96Ji99kYZP/7hn1cedc1+ApsTQ==
+
 hmac-drbg@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/hmac-drbg/-/hmac-drbg-1.0.1.tgz#d2745701025a6c775a6c545793ed502fc0c649a1"
@@ -4042,10 +4116,20 @@ hpack.js@^2.1.6:
     readable-stream "^2.0.1"
     wbuf "^1.1.0"
 
+hsl-regex@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/hsl-regex/-/hsl-regex-1.0.0.tgz#d49330c789ed819e276a4c0d272dffa30b18fe6e"
+  integrity sha1-1JMwx4ntgZ4nakwNJy3/owsY/m4=
+
+hsla-regex@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/hsla-regex/-/hsla-regex-1.0.0.tgz#c1ce7a3168c8c6614033a4b5f7877f3b225f9c38"
+  integrity sha1-wc56MWjIxmFAM6S194d/OyJfnDg=
+
 html-comment-regex@^1.1.0:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/html-comment-regex/-/html-comment-regex-1.1.1.tgz#668b93776eaae55ebde8f3ad464b307a4963625e"
-  integrity sha1-ZouTd26q5V696POtRkswekljYl4=
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/html-comment-regex/-/html-comment-regex-1.1.2.tgz#97d4688aeb5c81886a364faa0cad1dda14d433a7"
+  integrity sha512-P+M65QY2JQ5Y0G9KKdlDpo0zK+/OHptU5AaBwUfAIDJZk1MYf32Frm84EcOytfJE0t5JvkAnKlmjsXDnWzCJmQ==
 
 html-entities@^1.2.0:
   version "1.2.1"
@@ -4213,6 +4297,14 @@ import-cwd@^2.0.0:
   dependencies:
     import-from "^2.1.0"
 
+import-fresh@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/import-fresh/-/import-fresh-2.0.0.tgz#d81355c15612d386c61f9ddd3922d4304822a546"
+  integrity sha1-2BNVwVYS04bGH53dOSLUMEgipUY=
+  dependencies:
+    caller-path "^2.0.0"
+    resolve-from "^3.0.0"
+
 import-from@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/import-from/-/import-from-2.1.0.tgz#335db7f2a7affd53aaa471d4b8021dee36b7f3b1"
@@ -4375,6 +4467,11 @@ is-arrayish@^0.2.1:
   resolved "https://registry.yarnpkg.com/is-arrayish/-/is-arrayish-0.2.1.tgz#77c99840527aa8ecb1a8ba697b80645a7a926a9d"
   integrity sha1-d8mYQFJ6qOyxqLppe4BkWnqSap0=
 
+is-arrayish@^0.3.1:
+  version "0.3.2"
+  resolved "https://registry.yarnpkg.com/is-arrayish/-/is-arrayish-0.3.2.tgz#4574a2ae56f7ab206896fb431eaeed066fdf8f03"
+  integrity sha512-eVRqCvVlZbuw3GrM63ovNSNAeA1K16kaR/LRY/92w0zxQ5/1YzwblUX652i4Xs9RwAGjW9d9y6X88t8OaAJfWQ==
+
 is-binary-path@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-binary-path/-/is-binary-path-1.0.1.tgz#75f16642b480f187a711c814161fd3a4a7655898"
@@ -4399,6 +4496,18 @@ is-callable@^1.1.1, is-callable@^1.1.3:
   resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.4.tgz#1e1adf219e1eeb684d691f9d6a05ff0d30a24d75"
   integrity sha512-r5p9sxJjYnArLjObpjA4xu5EKI3CuKHkJXMhT7kwbpUyIFD1n5PMAsoPvWnvtZiNz7LjkYDRZhd7FlI0eMijEA==
 
+is-color-stop@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/is-color-stop/-/is-color-stop-1.1.0.tgz#cfff471aee4dd5c9e158598fbe12967b5cdad345"
+  integrity sha1-z/9HGu5N1cnhWFmPvhKWe1za00U=
+  dependencies:
+    css-color-names "^0.0.4"
+    hex-color-regex "^1.1.0"
+    hsl-regex "^1.0.0"
+    hsla-regex "^1.0.0"
+    rgb-regex "^1.0.1"
+    rgba-regex "^1.0.0"
+
 is-data-descriptor@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/is-data-descriptor/-/is-data-descriptor-0.1.4.tgz#0b5ee648388e2c860282e793f1856fec3f301b56"
@@ -4558,11 +4667,6 @@ is-path-inside@^1.0.0:
   dependencies:
     path-is-inside "^1.0.1"
 
-is-plain-obj@^1.0.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/is-plain-obj/-/is-plain-obj-1.1.0.tgz#71a50c8429dfca773c92a390a4a03b39fcd51d3e"
-  integrity sha1-caUMhCnfync8kqOQpKA7OfzVHT4=
-
 is-plain-object@^2.0.1, is-plain-object@^2.0.3, is-plain-object@^2.0.4:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/is-plain-object/-/is-plain-object-2.0.4.tgz#2c163b3fafb1b606d9d17928f05c2a1c38e07677"
@@ -4602,10 +4706,10 @@ is-stream@^1.1.0:
   resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-1.1.0.tgz#12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44"
   integrity sha1-EtSj3U5o4Lec6428hBc66A2RykQ=
 
-is-svg@^2.0.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/is-svg/-/is-svg-2.1.0.tgz#cf61090da0d9efbcab8722deba6f032208dbb0e9"
-  integrity sha1-z2EJDaDZ77yrhyLeum8DIgjbsOk=
+is-svg@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/is-svg/-/is-svg-3.0.0.tgz#9321dbd29c212e5ca99c4fa9794c714bcafa2f75"
+  integrity sha512-gi4iHK53LR2ujhLVVj+37Ykh9GLqYHX6JOVXbLAucaG/Cqw9xwdFOjDM2qeifLs1sF1npXXFvDu0r5HNgCMrzQ==
   dependencies:
     html-comment-regex "^1.1.0"
 
@@ -4666,7 +4770,7 @@ isstream@~0.1.2:
   resolved "https://registry.yarnpkg.com/isstream/-/isstream-0.1.2.tgz#47e63f7af55afa6f92e1500e690eb8b8529c099a"
   integrity sha1-R+Y/evVa+m+S4VAOaQ64uFKcCZo=
 
-js-base64@^2.1.8, js-base64@^2.1.9:
+js-base64@^2.1.8:
   version "2.4.6"
   resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-2.4.6.tgz#1d49f618bef43630cd191f4e122447acfdb947d8"
   integrity sha512-O9SR2NVICx6rCqh1qsU91QZ5IoNa+2T1ROJ0OQlfvATKGmnjsAvg3r0E5ufPZ4a95jdKTPXhFWiE/sOZ7a5Rtg==
@@ -4686,7 +4790,7 @@ js-tokens@^3.0.0, js-tokens@^3.0.2:
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
   integrity sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==
 
-js-yaml@^3.9.0, js-yaml@^3.9.1:
+js-yaml@^3.12.0, js-yaml@^3.9.0, js-yaml@^3.9.1:
   version "3.12.0"
   resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.12.0.tgz#eaed656ec8344f10f527c6bfa1b6e2244de167d1"
   integrity sha512-PIt2cnwmPfL4hKNwqeiuz4bKfnzHTBv6HyVgjahA6mPLwPDzjDWrplJBMjHUFxku/N3FlmrbyPclad+I+4mJ3A==
@@ -4694,14 +4798,6 @@ js-yaml@^3.9.0, js-yaml@^3.9.1:
     argparse "^1.0.7"
     esprima "^4.0.0"
 
-js-yaml@~3.7.0:
-  version "3.7.0"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.7.0.tgz#5c967ddd837a9bfdca5f2de84253abe8a1c03b80"
-  integrity sha1-XJZ93YN6m/3KXy3oQlOr6KHAO4A=
-  dependencies:
-    argparse "^1.0.7"
-    esprima "^2.6.0"
-
 jsbn@~0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/jsbn/-/jsbn-0.1.1.tgz#a5e654c2e5a2deb5f201d96cefbca80c0ef2f513"
@@ -4843,6 +4939,14 @@ klaw@^1.0.0:
   optionalDependencies:
     graceful-fs "^4.1.9"
 
+last-call-webpack-plugin@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/last-call-webpack-plugin/-/last-call-webpack-plugin-3.0.0.tgz#9742df0e10e3cf46e5c0381c2de90d3a7a2d7555"
+  integrity sha512-7KI2l2GIZa9p2spzPIVZBYyNKkN+e/SQPpnjlTiPhdbDW3F86tdKKELxKpzJ5sgU19wQWsACULZmpTPYHeWO5w==
+  dependencies:
+    lodash "^4.17.5"
+    webpack-sources "^1.1.0"
+
 lazy-cache@^1.0.3:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/lazy-cache/-/lazy-cache-1.0.4.tgz#a1d78fc3a50474cb80845d3b3b6e1da49a446e8e"
@@ -5010,11 +5114,6 @@ lodash.assign@^4.0.1, lodash.assign@^4.2.0:
   resolved "https://registry.yarnpkg.com/lodash.assign/-/lodash.assign-4.2.0.tgz#0d99f3ccd7a6d261d19bdaeb9245005d285808e7"
   integrity sha1-DZnzzNem0mHRm9rrkkUAXShYCOc=
 
-lodash.camelcase@^4.3.0:
-  version "4.3.0"
-  resolved "https://registry.yarnpkg.com/lodash.camelcase/-/lodash.camelcase-4.3.0.tgz#b28aa6288a2b9fc651035c7711f65ab6190331a6"
-  integrity sha1-soqmKIorn8ZRA1x3EfZathkDMaY=
-
 lodash.clonedeep@^4.3.2, lodash.clonedeep@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.clonedeep/-/lodash.clonedeep-4.5.0.tgz#e23f3f9c4f8fbdde872529c1071857a086e5ccef"
@@ -5126,7 +5225,7 @@ lodash@^3.10.1:
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
   integrity sha1-W/Rejkm6QYnhfUgnid/RW9FAt7Y=
 
-lodash@^4.17.10, lodash@^4.17.5:
+lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.5:
   version "4.17.11"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"
   integrity sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==
@@ -5208,11 +5307,6 @@ map-visit@^1.0.0:
   dependencies:
     object-visit "^1.0.0"
 
-math-expression-evaluator@^1.2.14:
-  version "1.2.17"
-  resolved "https://registry.yarnpkg.com/math-expression-evaluator/-/math-expression-evaluator-1.2.17.tgz#de819fdbcd84dccd8fae59c6aeb79615b9d266ac"
-  integrity sha1-3oGf282E3M2PrlnGrreWFbnSZqw=
-
 math-random@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/math-random/-/math-random-1.0.1.tgz#8b3aac588b8a66e4975e3cdea67f7bb329601fac"
@@ -5226,6 +5320,11 @@ md5.js@^1.3.4:
     hash-base "^3.0.0"
     inherits "^2.0.1"
 
+mdn-data@~1.1.0:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/mdn-data/-/mdn-data-1.1.4.tgz#50b5d4ffc4575276573c4eedb8780812a8419f01"
+  integrity sha512-FSYbp3lyKjyj3E7fMl6rYvUdX0FBXaluGqlFoYESWQlyUTq8R+wp0rkFxoYFqZlHCvsUXGjyJmLQSnXToYhOSA==
+
 media-typer@0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/media-typer/-/media-typer-0.3.0.tgz#8710d7af0aa626f8fffa1ce00168545263255748"
@@ -5682,6 +5781,13 @@ node-releases@^1.0.0-alpha.11:
   dependencies:
     semver "^5.3.0"
 
+node-releases@^1.0.1:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.0.3.tgz#3414ed84595096459c251699bfcb47d88324a9e4"
+  integrity sha512-ZaZWMsbuDcetpHmYeKWPO6e63pSXLb50M7lJgCbcM2nC/nQC3daNifmtp5a2kp7EWwYfhuvH6zLPWkrF8IiDdw==
+  dependencies:
+    semver "^5.3.0"
+
 node-sass@^4.5.3:
   version "4.9.2"
   resolved "https://registry.yarnpkg.com/node-sass/-/node-sass-4.9.2.tgz#5e63fe6bd0f2ae3ac9d6c14ede8620e2b8bdb437"
@@ -5744,15 +5850,10 @@ normalize-range@^0.1.2:
   resolved "https://registry.yarnpkg.com/normalize-range/-/normalize-range-0.1.2.tgz#2d10c06bdfd312ea9777695a4d28439456b75942"
   integrity sha1-LRDAa9/TEuqXd2laTShDlFa3WUI=
 
-normalize-url@^1.4.0:
-  version "1.9.1"
-  resolved "https://registry.yarnpkg.com/normalize-url/-/normalize-url-1.9.1.tgz#2cc0d66b31ea23036458436e3620d85954c66c3c"
-  integrity sha1-LMDWazHqIwNkWENuNiDYWVTGbDw=
-  dependencies:
-    object-assign "^4.0.1"
-    prepend-http "^1.0.0"
-    query-string "^4.1.0"
-    sort-keys "^1.0.0"
+normalize-url@^3.0.0:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/normalize-url/-/normalize-url-3.3.0.tgz#b2e1c4dc4f7c6d57743df733a4f5978d18650559"
+  integrity sha512-U+JJi7duF1o+u2pynbp2zXDW2/PADgC30f0GsHZtRh+HOcXHnw137TrNlyxxRvWW5fjKd3bcLHPxofWuCjaeZg==
 
 npm-bundled@^1.0.1:
   version "1.0.3"
@@ -5784,6 +5885,13 @@ npm-run-path@^2.0.0:
     gauge "~2.7.3"
     set-blocking "~2.0.0"
 
+nth-check@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/nth-check/-/nth-check-1.0.2.tgz#b2bd295c37e3dd58a3bf0700376663ba4d9cf05c"
+  integrity sha512-WeBOdju8SnzPN5vTUJYxYUxLeXpCaVP5i5e0LF8fg7WORF2Wd7wFX/pk0tYZk7s8T+J7VLy0Da6J1+wCT0AtHg==
+  dependencies:
+    boolbase "~1.0.0"
+
 nth-check@~1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/nth-check/-/nth-check-1.0.1.tgz#9929acdf628fc2c41098deab82ac580cf149aae4"
@@ -5880,6 +5988,16 @@ object.pick@^1.3.0:
   dependencies:
     isobject "^3.0.1"
 
+object.values@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/object.values/-/object.values-1.0.4.tgz#e524da09b4f66ff05df457546ec72ac99f13069a"
+  integrity sha1-5STaCbT2b/Bd9FdUbscqyZ8TBpo=
+  dependencies:
+    define-properties "^1.1.2"
+    es-abstract "^1.6.1"
+    function-bind "^1.1.0"
+    has "^1.0.1"
+
 obuf@^1.0.0, obuf@^1.1.1:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/obuf/-/obuf-1.1.2.tgz#09bea3343d41859ebd446292d11c9d4db619084e"
@@ -5931,6 +6049,14 @@ optimist@0.6.x, optimist@^0.6.1:
     minimist "~0.0.1"
     wordwrap "~0.0.2"
 
+optimize-css-assets-webpack-plugin@^5.0.1:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/optimize-css-assets-webpack-plugin/-/optimize-css-assets-webpack-plugin-5.0.1.tgz#9eb500711d35165b45e7fd60ba2df40cb3eb9159"
+  integrity sha512-Rqm6sSjWtx9FchdP0uzTQDc7GXDKnwVEGoSxjezPkzMewx7gEWE9IMUYKmigTRC4U3RaNSwYVnUDLuIdtTpm0A==
+  dependencies:
+    cssnano "^4.1.0"
+    last-call-webpack-plugin "^3.0.0"
+
 optionator@^0.8.1, optionator@^0.8.2:
   version "0.8.2"
   resolved "https://registry.yarnpkg.com/optionator/-/optionator-0.8.2.tgz#364c5e409d3f4d6301d6c0b4c05bba50180aeb64"
@@ -6282,74 +6408,62 @@ posix-character-classes@^0.1.0:
   resolved "https://registry.yarnpkg.com/posix-character-classes/-/posix-character-classes-0.1.1.tgz#01eac0fe3b5af71a2a6c02feabb8c1fef7e00eab"
   integrity sha1-AerA/jta9xoqbAL+q7jB/vfgDqs=
 
-postcss-calc@^5.2.0:
-  version "5.3.1"
-  resolved "https://registry.yarnpkg.com/postcss-calc/-/postcss-calc-5.3.1.tgz#77bae7ca928ad85716e2fda42f261bf7c1d65b5e"
-  integrity sha1-d7rnypKK2FcW4v2kLyYb98HWW14=
-  dependencies:
-    postcss "^5.0.2"
-    postcss-message-helpers "^2.0.0"
-    reduce-css-calc "^1.2.6"
-
-postcss-colormin@^2.1.8:
-  version "2.2.2"
-  resolved "https://registry.yarnpkg.com/postcss-colormin/-/postcss-colormin-2.2.2.tgz#6631417d5f0e909a3d7ec26b24c8a8d1e4f96e4b"
-  integrity sha1-ZjFBfV8OkJo9fsJrJMio0eT5bks=
-  dependencies:
-    colormin "^1.0.5"
-    postcss "^5.0.13"
-    postcss-value-parser "^3.2.3"
-
-postcss-convert-values@^2.3.4:
-  version "2.6.1"
-  resolved "https://registry.yarnpkg.com/postcss-convert-values/-/postcss-convert-values-2.6.1.tgz#bbd8593c5c1fd2e3d1c322bb925dcae8dae4d62d"
-  integrity sha1-u9hZPFwf0uPRwyK7kl3K6Nrk1i0=
+postcss-calc@^7.0.0:
+  version "7.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-calc/-/postcss-calc-7.0.1.tgz#36d77bab023b0ecbb9789d84dcb23c4941145436"
+  integrity sha512-oXqx0m6tb4N3JGdmeMSc/i91KppbYsFZKdH0xMOqK8V1rJlzrKlTdokz8ozUXLVejydRN6u2IddxpcijRj2FqQ==
   dependencies:
-    postcss "^5.0.11"
-    postcss-value-parser "^3.1.2"
+    css-unit-converter "^1.1.1"
+    postcss "^7.0.5"
+    postcss-selector-parser "^5.0.0-rc.4"
+    postcss-value-parser "^3.3.1"
 
-postcss-discard-comments@^2.0.4:
-  version "2.0.4"
-  resolved "https://registry.yarnpkg.com/postcss-discard-comments/-/postcss-discard-comments-2.0.4.tgz#befe89fafd5b3dace5ccce51b76b81514be00e3d"
-  integrity sha1-vv6J+v1bPazlzM5Rt2uBUUvgDj0=
+postcss-colormin@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/postcss-colormin/-/postcss-colormin-4.0.2.tgz#93cd1fa11280008696887db1a528048b18e7ed99"
+  integrity sha512-1QJc2coIehnVFsz0otges8kQLsryi4lo19WD+U5xCWvXd0uw/Z+KKYnbiNDCnO9GP+PvErPHCG0jNvWTngk9Rw==
   dependencies:
-    postcss "^5.0.14"
+    browserslist "^4.0.0"
+    color "^3.0.0"
+    has "^1.0.0"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
 
-postcss-discard-duplicates@^2.0.1:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/postcss-discard-duplicates/-/postcss-discard-duplicates-2.1.0.tgz#b9abf27b88ac188158a5eb12abcae20263b91932"
-  integrity sha1-uavye4isGIFYpesSq8riAmO5GTI=
+postcss-convert-values@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-convert-values/-/postcss-convert-values-4.0.1.tgz#ca3813ed4da0f812f9d43703584e449ebe189a7f"
+  integrity sha512-Kisdo1y77KUC0Jmn0OXU/COOJbzM8cImvw1ZFsBgBgMgb1iL23Zs/LXRe3r+EZqM3vGYKdQ2YJVQ5VkJI+zEJQ==
   dependencies:
-    postcss "^5.0.4"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
 
-postcss-discard-empty@^2.0.1:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/postcss-discard-empty/-/postcss-discard-empty-2.1.0.tgz#d2b4bd9d5ced5ebd8dcade7640c7d7cd7f4f92b5"
-  integrity sha1-0rS9nVztXr2Nyt52QMfXzX9PkrU=
+postcss-discard-comments@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-discard-comments/-/postcss-discard-comments-4.0.1.tgz#30697735b0c476852a7a11050eb84387a67ef55d"
+  integrity sha512-Ay+rZu1Sz6g8IdzRjUgG2NafSNpp2MSMOQUb+9kkzzzP+kh07fP0yNbhtFejURnyVXSX3FYy2nVNW1QTnNjgBQ==
   dependencies:
-    postcss "^5.0.14"
+    postcss "^7.0.0"
 
-postcss-discard-overridden@^0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/postcss-discard-overridden/-/postcss-discard-overridden-0.1.1.tgz#8b1eaf554f686fb288cd874c55667b0aa3668d58"
-  integrity sha1-ix6vVU9ob7KIzYdMVWZ7CqNmjVg=
+postcss-discard-duplicates@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/postcss-discard-duplicates/-/postcss-discard-duplicates-4.0.2.tgz#3fe133cd3c82282e550fc9b239176a9207b784eb"
+  integrity sha512-ZNQfR1gPNAiXZhgENFfEglF93pciw0WxMkJeVmw8eF+JZBbMD7jp6C67GqJAXVZP2BWbOztKfbsdmMp/k8c6oQ==
   dependencies:
-    postcss "^5.0.16"
+    postcss "^7.0.0"
 
-postcss-discard-unused@^2.2.1:
-  version "2.2.3"
-  resolved "https://registry.yarnpkg.com/postcss-discard-unused/-/postcss-discard-unused-2.2.3.tgz#bce30b2cc591ffc634322b5fb3464b6d934f4433"
-  integrity sha1-vOMLLMWR/8Y0Mitfs0ZLbZNPRDM=
+postcss-discard-empty@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-discard-empty/-/postcss-discard-empty-4.0.1.tgz#c8c951e9f73ed9428019458444a02ad90bb9f765"
+  integrity sha512-B9miTzbznhDjTfjvipfHoqbWKwd0Mj+/fL5s1QOz06wufguil+Xheo4XpOnc4NqKYBCNqqEzgPv2aPBIJLox0w==
   dependencies:
-    postcss "^5.0.14"
-    uniqs "^2.0.0"
+    postcss "^7.0.0"
 
-postcss-filter-plugins@^2.0.0:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/postcss-filter-plugins/-/postcss-filter-plugins-2.0.3.tgz#82245fdf82337041645e477114d8e593aa18b8ec"
-  integrity sha512-T53GVFsdinJhgwm7rg1BzbeBRomOg9y5MBVhGcsV0CxurUdVj1UlPdKtn7aqYA/c/QVkzKMjq2bSV5dKG5+AwQ==
+postcss-discard-overridden@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-discard-overridden/-/postcss-discard-overridden-4.0.1.tgz#652aef8a96726f029f5e3e00146ee7a4e755ff57"
+  integrity sha512-IYY2bEDD7g1XM1IDEsUT4//iEYCxAmP5oDSFMVU/JVvT7gh+l4fmjciLqGgwjdWpQIdb0Che2VX00QObS5+cTg==
   dependencies:
-    postcss "^5.0.4"
+    postcss "^7.0.0"
 
 postcss-load-config@^2.0.0:
   version "2.0.0"
@@ -6369,74 +6483,67 @@ postcss-loader@^3.0.0:
     postcss-load-config "^2.0.0"
     schema-utils "^1.0.0"
 
-postcss-merge-idents@^2.1.5:
-  version "2.1.7"
-  resolved "https://registry.yarnpkg.com/postcss-merge-idents/-/postcss-merge-idents-2.1.7.tgz#4c5530313c08e1d5b3bbf3d2bbc747e278eea270"
-  integrity sha1-TFUwMTwI4dWzu/PSu8dH4njuonA=
-  dependencies:
-    has "^1.0.1"
-    postcss "^5.0.10"
-    postcss-value-parser "^3.1.1"
-
-postcss-merge-longhand@^2.0.1:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/postcss-merge-longhand/-/postcss-merge-longhand-2.0.2.tgz#23d90cd127b0a77994915332739034a1a4f3d658"
-  integrity sha1-I9kM0Sewp3mUkVMyc5A0oaTz1lg=
+postcss-merge-longhand@^4.0.9:
+  version "4.0.9"
+  resolved "https://registry.yarnpkg.com/postcss-merge-longhand/-/postcss-merge-longhand-4.0.9.tgz#c2428b994833ffb2a072f290ca642e75ceabcd6f"
+  integrity sha512-UVMXrXF5K/kIwUbK/crPFCytpWbNX2Q3dZSc8+nQUgfOHrCT4+MHncpdxVphUlQeZxlLXUJbDyXc5NBhTnS2tA==
   dependencies:
-    postcss "^5.0.4"
+    css-color-names "0.0.4"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
+    stylehacks "^4.0.0"
 
-postcss-merge-rules@^2.0.3:
-  version "2.1.2"
-  resolved "https://registry.yarnpkg.com/postcss-merge-rules/-/postcss-merge-rules-2.1.2.tgz#d1df5dfaa7b1acc3be553f0e9e10e87c61b5f721"
-  integrity sha1-0d9d+qexrMO+VT8OnhDofGG19yE=
+postcss-merge-rules@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/postcss-merge-rules/-/postcss-merge-rules-4.0.2.tgz#2be44401bf19856f27f32b8b12c0df5af1b88e74"
+  integrity sha512-UiuXwCCJtQy9tAIxsnurfF0mrNHKc4NnNx6NxqmzNNjXpQwLSukUxELHTRF0Rg1pAmcoKLih8PwvZbiordchag==
   dependencies:
-    browserslist "^1.5.2"
-    caniuse-api "^1.5.2"
-    postcss "^5.0.4"
-    postcss-selector-parser "^2.2.2"
+    browserslist "^4.0.0"
+    caniuse-api "^3.0.0"
+    cssnano-util-same-parent "^4.0.0"
+    postcss "^7.0.0"
+    postcss-selector-parser "^3.0.0"
     vendors "^1.0.0"
 
-postcss-message-helpers@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/postcss-message-helpers/-/postcss-message-helpers-2.0.0.tgz#a4f2f4fab6e4fe002f0aed000478cdf52f9ba60e"
-  integrity sha1-pPL0+rbk/gAvCu0ABHjN9S+bpg4=
-
-postcss-minify-font-values@^1.0.2:
-  version "1.0.5"
-  resolved "https://registry.yarnpkg.com/postcss-minify-font-values/-/postcss-minify-font-values-1.0.5.tgz#4b58edb56641eba7c8474ab3526cafd7bbdecb69"
-  integrity sha1-S1jttWZB66fIR0qzUmyv17vey2k=
+postcss-minify-font-values@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/postcss-minify-font-values/-/postcss-minify-font-values-4.0.2.tgz#cd4c344cce474343fac5d82206ab2cbcb8afd5a6"
+  integrity sha512-j85oO6OnRU9zPf04+PZv1LYIYOprWm6IA6zkXkrJXyRveDEuQggG6tvoy8ir8ZwjLxLuGfNkCZEQG7zan+Hbtg==
   dependencies:
-    object-assign "^4.0.1"
-    postcss "^5.0.4"
-    postcss-value-parser "^3.0.2"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
 
-postcss-minify-gradients@^1.0.1:
-  version "1.0.5"
-  resolved "https://registry.yarnpkg.com/postcss-minify-gradients/-/postcss-minify-gradients-1.0.5.tgz#5dbda11373703f83cfb4a3ea3881d8d75ff5e6e1"
-  integrity sha1-Xb2hE3NwP4PPtKPqOIHY11/15uE=
+postcss-minify-gradients@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-minify-gradients/-/postcss-minify-gradients-4.0.1.tgz#6da95c6e92a809f956bb76bf0c04494953e1a7dd"
+  integrity sha512-pySEW3E6Ly5mHm18rekbWiAjVi/Wj8KKt2vwSfVFAWdW6wOIekgqxKxLU7vJfb107o3FDNPkaYFCxGAJBFyogA==
   dependencies:
-    postcss "^5.0.12"
-    postcss-value-parser "^3.3.0"
+    cssnano-util-get-arguments "^4.0.0"
+    is-color-stop "^1.0.0"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
 
-postcss-minify-params@^1.0.4:
-  version "1.2.2"
-  resolved "https://registry.yarnpkg.com/postcss-minify-params/-/postcss-minify-params-1.2.2.tgz#ad2ce071373b943b3d930a3fa59a358c28d6f1f3"
-  integrity sha1-rSzgcTc7lDs9kwo/pZo1jCjW8fM=
+postcss-minify-params@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-minify-params/-/postcss-minify-params-4.0.1.tgz#5b2e2d0264dd645ef5d68f8fec0d4c38c1cf93d2"
+  integrity sha512-h4W0FEMEzBLxpxIVelRtMheskOKKp52ND6rJv+nBS33G1twu2tCyurYj/YtgU76+UDCvWeNs0hs8HFAWE2OUFg==
   dependencies:
-    alphanum-sort "^1.0.1"
-    postcss "^5.0.2"
-    postcss-value-parser "^3.0.2"
+    alphanum-sort "^1.0.0"
+    browserslist "^4.0.0"
+    cssnano-util-get-arguments "^4.0.0"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
     uniqs "^2.0.0"
 
-postcss-minify-selectors@^2.0.4:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/postcss-minify-selectors/-/postcss-minify-selectors-2.1.1.tgz#b2c6a98c0072cf91b932d1a496508114311735bf"
-  integrity sha1-ssapjAByz5G5MtGkllCBFDEXNb8=
+postcss-minify-selectors@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-minify-selectors/-/postcss-minify-selectors-4.0.1.tgz#a891c197977cc37abf60b3ea06b84248b1c1e9cd"
+  integrity sha512-8+plQkomve3G+CodLCgbhAKrb5lekAnLYuL1d7Nz+/7RANpBEVdgBkPNwljfSKvZ9xkkZTZITd04KP+zeJTJqg==
   dependencies:
-    alphanum-sort "^1.0.2"
-    has "^1.0.1"
-    postcss "^5.0.14"
-    postcss-selector-parser "^2.0.0"
+    alphanum-sort "^1.0.0"
+    has "^1.0.0"
+    postcss "^7.0.0"
+    postcss-selector-parser "^3.0.0"
 
 postcss-modules-extract-imports@^1.2.0:
   version "1.2.0"
@@ -6469,65 +6576,117 @@ postcss-modules-values@^1.3.0:
     icss-replace-symbols "^1.1.0"
     postcss "^6.0.1"
 
-postcss-normalize-charset@^1.1.0:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/postcss-normalize-charset/-/postcss-normalize-charset-1.1.1.tgz#ef9ee71212d7fe759c78ed162f61ed62b5cb93f1"
-  integrity sha1-757nEhLX/nWceO0WL2HtYrXLk/E=
+postcss-normalize-charset@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-normalize-charset/-/postcss-normalize-charset-4.0.1.tgz#8b35add3aee83a136b0471e0d59be58a50285dd4"
+  integrity sha512-gMXCrrlWh6G27U0hF3vNvR3w8I1s2wOBILvA87iNXaPvSNo5uZAMYsZG7XjCUf1eVxuPfyL4TJ7++SGZLc9A3g==
   dependencies:
-    postcss "^5.0.5"
+    postcss "^7.0.0"
 
-postcss-normalize-url@^3.0.7:
-  version "3.0.8"
-  resolved "https://registry.yarnpkg.com/postcss-normalize-url/-/postcss-normalize-url-3.0.8.tgz#108f74b3f2fcdaf891a2ffa3ea4592279fc78222"
-  integrity sha1-EI90s/L82viRov+j6kWSJ5/HgiI=
+postcss-normalize-display-values@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-normalize-display-values/-/postcss-normalize-display-values-4.0.1.tgz#d9a83d47c716e8a980f22f632c8b0458cfb48a4c"
+  integrity sha512-R5mC4vaDdvsrku96yXP7zak+O3Mm9Y8IslUobk7IMP+u/g+lXvcN4jngmHY5zeJnrQvE13dfAg5ViU05ZFDwdg==
   dependencies:
-    is-absolute-url "^2.0.0"
-    normalize-url "^1.4.0"
-    postcss "^5.0.14"
-    postcss-value-parser "^3.2.3"
+    cssnano-util-get-match "^4.0.0"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
 
-postcss-ordered-values@^2.1.0:
-  version "2.2.3"
-  resolved "https://registry.yarnpkg.com/postcss-ordered-values/-/postcss-ordered-values-2.2.3.tgz#eec6c2a67b6c412a8db2042e77fe8da43f95c11d"
-  integrity sha1-7sbCpntsQSqNsgQud/6NpD+VwR0=
+postcss-normalize-positions@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-normalize-positions/-/postcss-normalize-positions-4.0.1.tgz#ee2d4b67818c961964c6be09d179894b94fd6ba1"
+  integrity sha512-GNoOaLRBM0gvH+ZRb2vKCIujzz4aclli64MBwDuYGU2EY53LwiP7MxOZGE46UGtotrSnmarPPZ69l2S/uxdaWA==
   dependencies:
-    postcss "^5.0.4"
-    postcss-value-parser "^3.0.1"
+    cssnano-util-get-arguments "^4.0.0"
+    has "^1.0.0"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
 
-postcss-reduce-idents@^2.2.2:
-  version "2.4.0"
-  resolved "https://registry.yarnpkg.com/postcss-reduce-idents/-/postcss-reduce-idents-2.4.0.tgz#c2c6d20cc958284f6abfbe63f7609bf409059ad3"
-  integrity sha1-wsbSDMlYKE9qv75j92Cb9AkFmtM=
+postcss-normalize-repeat-style@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-normalize-repeat-style/-/postcss-normalize-repeat-style-4.0.1.tgz#5293f234b94d7669a9f805495d35b82a581c50e5"
+  integrity sha512-fFHPGIjBUyUiswY2rd9rsFcC0t3oRta4wxE1h3lpwfQZwFeFjXFSiDtdJ7APCmHQOnUZnqYBADNRPKPwFAONgA==
   dependencies:
-    postcss "^5.0.4"
-    postcss-value-parser "^3.0.2"
+    cssnano-util-get-arguments "^4.0.0"
+    cssnano-util-get-match "^4.0.0"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
 
-postcss-reduce-initial@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/postcss-reduce-initial/-/postcss-reduce-initial-1.0.1.tgz#68f80695f045d08263a879ad240df8dd64f644ea"
-  integrity sha1-aPgGlfBF0IJjqHmtJA343WT2ROo=
+postcss-normalize-string@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-normalize-string/-/postcss-normalize-string-4.0.1.tgz#23c5030c2cc24175f66c914fa5199e2e3c10fef3"
+  integrity sha512-IJoexFTkAvAq5UZVxWXAGE0yLoNN/012v7TQh5nDo6imZJl2Fwgbhy3J2qnIoaDBrtUP0H7JrXlX1jjn2YcvCQ==
   dependencies:
-    postcss "^5.0.4"
+    has "^1.0.0"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
 
-postcss-reduce-transforms@^1.0.3:
-  version "1.0.4"
-  resolved "https://registry.yarnpkg.com/postcss-reduce-transforms/-/postcss-reduce-transforms-1.0.4.tgz#ff76f4d8212437b31c298a42d2e1444025771ae1"
-  integrity sha1-/3b02CEkN7McKYpC0uFEQCV3GuE=
+postcss-normalize-timing-functions@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-normalize-timing-functions/-/postcss-normalize-timing-functions-4.0.1.tgz#8be83e0b9cb3ff2d1abddee032a49108f05f95d7"
+  integrity sha512-1nOtk7ze36+63ONWD8RCaRDYsnzorrj+Q6fxkQV+mlY5+471Qx9kspqv0O/qQNMeApg8KNrRf496zHwJ3tBZ7w==
   dependencies:
-    has "^1.0.1"
-    postcss "^5.0.8"
-    postcss-value-parser "^3.0.1"
+    cssnano-util-get-match "^4.0.0"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
 
-postcss-selector-parser@^2.0.0, postcss-selector-parser@^2.2.2:
-  version "2.2.3"
-  resolved "https://registry.yarnpkg.com/postcss-selector-parser/-/postcss-selector-parser-2.2.3.tgz#f9437788606c3c9acee16ffe8d8b16297f27bb90"
-  integrity sha1-+UN3iGBsPJrO4W/+jYsWKX8nu5A=
+postcss-normalize-unicode@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-normalize-unicode/-/postcss-normalize-unicode-4.0.1.tgz#841bd48fdcf3019ad4baa7493a3d363b52ae1cfb"
+  integrity sha512-od18Uq2wCYn+vZ/qCOeutvHjB5jm57ToxRaMeNuf0nWVHaP9Hua56QyMF6fs/4FSUnVIw0CBPsU0K4LnBPwYwg==
   dependencies:
-    flatten "^1.0.2"
-    indexes-of "^1.0.1"
-    uniq "^1.0.1"
+    browserslist "^4.0.0"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
+
+postcss-normalize-url@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-normalize-url/-/postcss-normalize-url-4.0.1.tgz#10e437f86bc7c7e58f7b9652ed878daaa95faae1"
+  integrity sha512-p5oVaF4+IHwu7VpMan/SSpmpYxcJMtkGppYf0VbdH5B6hN8YNmVyJLuY9FmLQTzY3fag5ESUUHDqM+heid0UVA==
+  dependencies:
+    is-absolute-url "^2.0.0"
+    normalize-url "^3.0.0"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
+
+postcss-normalize-whitespace@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-normalize-whitespace/-/postcss-normalize-whitespace-4.0.1.tgz#d14cb639b61238418ac8bc8d3b7bdd65fc86575e"
+  integrity sha512-U8MBODMB2L+nStzOk6VvWWjZgi5kQNShCyjRhMT3s+W9Jw93yIjOnrEkKYD3Ul7ChWbEcjDWmXq0qOL9MIAnAw==
+  dependencies:
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
+
+postcss-ordered-values@^4.1.1:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/postcss-ordered-values/-/postcss-ordered-values-4.1.1.tgz#2e3b432ef3e489b18333aeca1f1295eb89be9fc2"
+  integrity sha512-PeJiLgJWPzkVF8JuKSBcylaU+hDJ/TX3zqAMIjlghgn1JBi6QwQaDZoDIlqWRcCAI8SxKrt3FCPSRmOgKRB97Q==
+  dependencies:
+    cssnano-util-get-arguments "^4.0.0"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
+
+postcss-reduce-initial@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/postcss-reduce-initial/-/postcss-reduce-initial-4.0.2.tgz#bac8e325d67510ee01fa460676dc8ea9e3b40f15"
+  integrity sha512-epUiC39NonKUKG+P3eAOKKZtm5OtAtQJL7Ye0CBN1f+UQTHzqotudp+hki7zxXm7tT0ZAKDMBj1uihpPjP25ug==
+  dependencies:
+    browserslist "^4.0.0"
+    caniuse-api "^3.0.0"
+    has "^1.0.0"
+    postcss "^7.0.0"
 
-postcss-selector-parser@^3.1.1:
+postcss-reduce-transforms@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-reduce-transforms/-/postcss-reduce-transforms-4.0.1.tgz#8600d5553bdd3ad640f43bff81eb52f8760d4561"
+  integrity sha512-sZVr3QlGs0pjh6JAIe6DzWvBaqYw05V1t3d9Tp+VnFRT5j+rsqoWsysh/iSD7YNsULjq9IAylCznIwVd5oU/zA==
+  dependencies:
+    cssnano-util-get-match "^4.0.0"
+    has "^1.0.0"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
+
+postcss-selector-parser@^3.0.0, postcss-selector-parser@^3.1.1:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/postcss-selector-parser/-/postcss-selector-parser-3.1.1.tgz#4f875f4afb0c96573d5cf4d74011aee250a7e865"
   integrity sha1-T4dfSvsMllc9XPTXQBGu4lCn6GU=
@@ -6536,49 +6695,44 @@ postcss-selector-parser@^3.1.1:
     indexes-of "^1.0.1"
     uniq "^1.0.1"
 
-postcss-svgo@^2.1.1:
-  version "2.1.6"
-  resolved "https://registry.yarnpkg.com/postcss-svgo/-/postcss-svgo-2.1.6.tgz#b6df18aa613b666e133f08adb5219c2684ac108d"
-  integrity sha1-tt8YqmE7Zm4TPwittSGcJoSsEI0=
+postcss-selector-parser@^5.0.0-rc.4:
+  version "5.0.0-rc.4"
+  resolved "https://registry.yarnpkg.com/postcss-selector-parser/-/postcss-selector-parser-5.0.0-rc.4.tgz#ca5e77238bf152966378c13e91ad6d611568ea87"
+  integrity sha512-0XvfYuShrKlTk1ooUrVzMCFQRcypsdEIsGqh5IxC5rdtBi4/M/tDAJeSONwC2MTqEFsmPZYAV7Dd4X8rgAfV0A==
   dependencies:
-    is-svg "^2.0.0"
-    postcss "^5.0.14"
-    postcss-value-parser "^3.2.3"
-    svgo "^0.7.0"
+    cssesc "^2.0.0"
+    indexes-of "^1.0.1"
+    uniq "^1.0.1"
 
-postcss-unique-selectors@^2.0.2:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/postcss-unique-selectors/-/postcss-unique-selectors-2.0.2.tgz#981d57d29ddcb33e7b1dfe1fd43b8649f933ca1d"
-  integrity sha1-mB1X0p3csz57Hf4f1DuGSfkzyh0=
+postcss-svgo@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-svgo/-/postcss-svgo-4.0.1.tgz#5628cdb38f015de6b588ce6d0bf0724b492b581d"
+  integrity sha512-YD5uIk5NDRySy0hcI+ZJHwqemv2WiqqzDgtvgMzO8EGSkK5aONyX8HMVFRFJSdO8wUWTuisUFn/d7yRRbBr5Qw==
   dependencies:
-    alphanum-sort "^1.0.1"
-    postcss "^5.0.4"
+    is-svg "^3.0.0"
+    postcss "^7.0.0"
+    postcss-value-parser "^3.0.0"
+    svgo "^1.0.0"
+
+postcss-unique-selectors@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/postcss-unique-selectors/-/postcss-unique-selectors-4.0.1.tgz#9446911f3289bfd64c6d680f073c03b1f9ee4bac"
+  integrity sha512-+JanVaryLo9QwZjKrmJgkI4Fn8SBgRO6WXQBJi7KiAVPlmxikB5Jzc4EvXMT2H0/m0RjrVVm9rGNhZddm/8Spg==
+  dependencies:
+    alphanum-sort "^1.0.0"
+    postcss "^7.0.0"
     uniqs "^2.0.0"
 
-postcss-value-parser@^3.0.1, postcss-value-parser@^3.0.2, postcss-value-parser@^3.1.1, postcss-value-parser@^3.1.2, postcss-value-parser@^3.2.3, postcss-value-parser@^3.3.0:
+postcss-value-parser@^3.0.0, postcss-value-parser@^3.3.1:
+  version "3.3.1"
+  resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-3.3.1.tgz#9ff822547e2893213cf1c30efa51ac5fd1ba8281"
+  integrity sha512-pISE66AbVkp4fDQ7VHBwRNXzAAKJjw4Vw7nWI/+Q3vuly7SNfgYXvm6i5IgFylHGK5sP/xHAbB7N49OS4gWNyQ==
+
+postcss-value-parser@^3.2.3, postcss-value-parser@^3.3.0:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-3.3.0.tgz#87f38f9f18f774a4ab4c8a232f5c5ce8872a9d15"
   integrity sha1-h/OPnxj3dKSrTIojL1xc6IcqnRU=
 
-postcss-zindex@^2.0.1:
-  version "2.2.0"
-  resolved "https://registry.yarnpkg.com/postcss-zindex/-/postcss-zindex-2.2.0.tgz#d2109ddc055b91af67fc4cb3b025946639d2af22"
-  integrity sha1-0hCd3AVbka9n/EyzsCWUZjnSryI=
-  dependencies:
-    has "^1.0.1"
-    postcss "^5.0.4"
-    uniqs "^2.0.0"
-
-postcss@^5.0.10, postcss@^5.0.11, postcss@^5.0.12, postcss@^5.0.13, postcss@^5.0.14, postcss@^5.0.16, postcss@^5.0.2, postcss@^5.0.4, postcss@^5.0.5, postcss@^5.0.6, postcss@^5.0.8, postcss@^5.2.16:
-  version "5.2.18"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-5.2.18.tgz#badfa1497d46244f6390f58b319830d9107853c5"
-  integrity sha512-zrUjRRe1bpXKsX1qAJNJjqZViErVuyEkMTRrwu4ud4sbTtIBRmtaYDrHmcGgmrbsW3MHfmtIf+vJumgQn+PrXg==
-  dependencies:
-    chalk "^1.1.3"
-    js-base64 "^2.1.9"
-    source-map "^0.5.6"
-    supports-color "^3.2.3"
-
 postcss@^6.0.1, postcss@^6.0.20, postcss@^6.0.23:
   version "6.0.23"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.23.tgz#61c82cc328ac60e677645f979054eb98bc0e3324"
@@ -6588,7 +6742,7 @@ postcss@^6.0.1, postcss@^6.0.20, postcss@^6.0.23:
     source-map "^0.6.1"
     supports-color "^5.4.0"
 
-postcss@^7.0.0:
+postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.5:
   version "7.0.5"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.5.tgz#70e6443e36a6d520b0fd4e7593fcca3635ee9f55"
   integrity sha512-HBNpviAUFCKvEh7NZhw1e8MBPivRszIiUnhrJ+sBFVSYSqubrzwX3KG51mYgcRHX8j/cAgZJedONZcm5jTBdgQ==
@@ -6630,11 +6784,6 @@ prelude-ls@~1.1.2:
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
   integrity sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ=
 
-prepend-http@^1.0.0:
-  version "1.0.4"
-  resolved "https://registry.yarnpkg.com/prepend-http/-/prepend-http-1.0.4.tgz#d4f4562b0ce3696e41ac52d0e002e57a635dc6dc"
-  integrity sha1-1PRWKwzjaW5BrFLQ4ALlemNdxtw=
-
 preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
@@ -6802,14 +6951,6 @@ qs@~6.5.1:
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.5.2.tgz#cb3ae806e8740444584ef154ce8ee98d403f3e36"
   integrity sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA==
 
-query-string@^4.1.0:
-  version "4.3.4"
-  resolved "https://registry.yarnpkg.com/query-string/-/query-string-4.3.4.tgz#bbb693b9ca915c232515b228b1a02b609043dbeb"
-  integrity sha1-u7aTucqRXCMlFbIosaArYJBD2+s=
-  dependencies:
-    object-assign "^4.1.0"
-    strict-uri-encode "^1.0.0"
-
 querystring-es3@^0.2.0:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/querystring-es3/-/querystring-es3-0.2.1.tgz#9ec61f79049875707d69414596fd907a4d711e73"
@@ -6958,22 +7099,6 @@ redent@^1.0.0:
     indent-string "^2.1.0"
     strip-indent "^1.0.1"
 
-reduce-css-calc@^1.2.6:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/reduce-css-calc/-/reduce-css-calc-1.3.0.tgz#747c914e049614a4c9cfbba629871ad1d2927716"
-  integrity sha1-dHyRTgSWFKTJz7umKYca0dKSdxY=
-  dependencies:
-    balanced-match "^0.4.2"
-    math-expression-evaluator "^1.2.14"
-    reduce-function-call "^1.0.1"
-
-reduce-function-call@^1.0.1:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/reduce-function-call/-/reduce-function-call-1.0.2.tgz#5a200bf92e0e37751752fe45b0ab330fd4b6be99"
-  integrity sha1-WiAL+S4ON3UXUv5FsKszD9S2vpk=
-  dependencies:
-    balanced-match "^0.4.2"
-
 regenerate-unicode-properties@^7.0.0:
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/regenerate-unicode-properties/-/regenerate-unicode-properties-7.0.0.tgz#107405afcc4a190ec5ed450ecaa00ed0cafa7a4c"
@@ -7248,6 +7373,16 @@ rework@^1.0.1:
     convert-source-map "^0.3.3"
     css "^2.0.0"
 
+rgb-regex@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/rgb-regex/-/rgb-regex-1.0.1.tgz#c0e0d6882df0e23be254a475e8edd41915feaeb1"
+  integrity sha1-wODWiC3w4jviVKR16O3UGRX+rrE=
+
+rgba-regex@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/rgba-regex/-/rgba-regex-1.0.0.tgz#43374e2e2ca0968b0ef1523460b7d730ff22eeb3"
+  integrity sha1-QzdOLiyglosO8VI0YLfXMP8i7rM=
+
 right-align@^0.1.1:
   version "0.1.3"
   resolved "https://registry.yarnpkg.com/right-align/-/right-align-0.1.3.tgz#61339b722fe6a3515689210d24e14c96148613ef"
@@ -7356,7 +7491,7 @@ sax@0.5.x:
   resolved "https://registry.yarnpkg.com/sax/-/sax-0.5.8.tgz#d472db228eb331c2506b0e8c15524adb939d12c1"
   integrity sha1-1HLbIo6zMcJQaw6MFVJK25OdEsE=
 
-sax@^1.1.4, sax@^1.2.4, sax@~1.2.1:
+sax@^1.1.4, sax@^1.2.4, sax@~1.2.4:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
   integrity sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==
@@ -7544,6 +7679,13 @@ signal-exit@^3.0.0, signal-exit@^3.0.2:
   resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-3.0.2.tgz#b5fdc08f1287ea1178628e415e25132b73646c6d"
   integrity sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0=
 
+simple-swizzle@^0.2.2:
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/simple-swizzle/-/simple-swizzle-0.2.2.tgz#a4da6b635ffcccca33f70d17cb92592de95e557a"
+  integrity sha1-pNprY1/8zMoz9w0Xy5JZLeleVXo=
+  dependencies:
+    is-arrayish "^0.3.1"
+
 sinon@^2.3.4:
   version "2.4.1"
   resolved "https://registry.yarnpkg.com/sinon/-/sinon-2.4.1.tgz#021fd64b54cb77d9d2fb0d43cdedfae7629c3a36"
@@ -7622,13 +7764,6 @@ sockjs@0.3.19:
     faye-websocket "^0.10.0"
     uuid "^3.0.1"
 
-sort-keys@^1.0.0:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/sort-keys/-/sort-keys-1.1.2.tgz#441b6d4d346798f1b4e49e8920adfba0e543f9ad"
-  integrity sha1-RBttTTRnmPG05J6JIK37oOVD+a0=
-  dependencies:
-    is-plain-obj "^1.0.0"
-
 source-list-map@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/source-list-map/-/source-list-map-2.0.0.tgz#aaa47403f7b245a92fbc97ea08f250d6087ed085"
@@ -7775,6 +7910,11 @@ ssri@^6.0.0:
   dependencies:
     figgy-pudding "^3.5.1"
 
+stable@~0.1.6:
+  version "0.1.8"
+  resolved "https://registry.yarnpkg.com/stable/-/stable-0.1.8.tgz#836eb3c8382fe2936feaf544631017ce7d47a3cf"
+  integrity sha512-ji9qxRnOVfcuLDySj9qzhGSEFVobyt1kIOSkj1qZzYLzq7Tos/oUUWvotUPQLlrsidqsK6tBH89Bc9kL5zHA6w==
+
 stackframe@^1.0.4:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/stackframe/-/stackframe-1.0.4.tgz#357b24a992f9427cba6b545d96a14ed2cbca187b"
@@ -7842,11 +7982,6 @@ stream-shift@^1.0.0:
   resolved "https://registry.yarnpkg.com/stream-shift/-/stream-shift-1.0.0.tgz#d5c752825e5367e786f78e18e445ea223a155952"
   integrity sha1-1cdSgl5TZ+eG944Y5EXqIjoVWVI=
 
-strict-uri-encode@^1.0.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/strict-uri-encode/-/strict-uri-encode-1.1.0.tgz#279b225df1d582b1f54e65addd4352e18faa0713"
-  integrity sha1-J5siXfHVgrH1TmWt3UNS4Y+qBxM=
-
 string-width@^1.0.1, string-width@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/string-width/-/string-width-1.0.2.tgz#118bdf5b8cdc51a2a7e70d211e07e2b0b9b107d3"
@@ -7932,6 +8067,15 @@ style-loader@^0.21.0:
     loader-utils "^1.1.0"
     schema-utils "^0.4.5"
 
+stylehacks@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/stylehacks/-/stylehacks-4.0.1.tgz#3186595d047ab0df813d213e51c8b94e0b9010f2"
+  integrity sha512-TK5zEPeD9NyC1uPIdjikzsgWxdQQN/ry1X3d1iOz1UkYDCmcr928gWD1KHgyC27F50UnE0xCTrBOO1l6KR8M4w==
+  dependencies:
+    browserslist "^4.0.0"
+    postcss "^7.0.0"
+    postcss-selector-parser "^3.0.0"
+
 stylus-loader@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/stylus-loader/-/stylus-loader-3.0.2.tgz#27a706420b05a38e038e7cacb153578d450513c6"
@@ -7965,13 +8109,6 @@ supports-color@^2.0.0:
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-2.0.0.tgz#535d045ce6b6363fa40117084629995e9df324c7"
   integrity sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=
 
-supports-color@^3.2.3:
-  version "3.2.3"
-  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-3.2.3.tgz#65ac0504b3954171d8a64946b2ae3cbb8a5f54f6"
-  integrity sha1-ZawFBLOVQXHYpklGsq48u4pfVPY=
-  dependencies:
-    has-flag "^1.0.0"
-
 supports-color@^5.1.0, supports-color@^5.4.0:
   version "5.4.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.4.0.tgz#1c6b337402c2137605efe19f10fec390f6faab54"
@@ -7986,18 +8123,25 @@ supports-color@^5.3.0, supports-color@^5.5.0:
   dependencies:
     has-flag "^3.0.0"
 
-svgo@^0.7.0:
-  version "0.7.2"
-  resolved "https://registry.yarnpkg.com/svgo/-/svgo-0.7.2.tgz#9f5772413952135c6fefbf40afe6a4faa88b4bb5"
-  integrity sha1-n1dyQTlSE1xv779Ar+ak+qiLS7U=
+svgo@^1.0.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/svgo/-/svgo-1.1.1.tgz#12384b03335bcecd85cfa5f4e3375fed671cb985"
+  integrity sha512-GBkJbnTuFpM4jFbiERHDWhZc/S/kpHToqmZag3aEBjPYK44JAN2QBjvrGIxLOoCyMZjuFQIfTO2eJd8uwLY/9g==
   dependencies:
-    coa "~1.0.1"
+    coa "~2.0.1"
     colors "~1.1.2"
-    csso "~2.3.1"
-    js-yaml "~3.7.0"
+    css-select "^2.0.0"
+    css-select-base-adapter "~0.1.0"
+    css-tree "1.0.0-alpha.28"
+    css-url-regex "^1.1.0"
+    csso "^3.5.0"
+    js-yaml "^3.12.0"
     mkdirp "~0.5.1"
-    sax "~1.2.1"
-    whet.extend "~0.9.9"
+    object.values "^1.0.4"
+    sax "~1.2.4"
+    stable "~0.1.6"
+    unquote "~1.1.1"
+    util.promisify "~1.0.0"
 
 "symbol-tree@>= 3.1.0 < 4.0.0":
   version "3.2.2"
@@ -8106,6 +8250,11 @@ timers-browserify@^2.0.4:
   dependencies:
     setimmediate "^1.0.4"
 
+timsort@^0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/timsort/-/timsort-0.3.0.tgz#405411a8e7e6339fe64db9a234de11dc31e02bd4"
+  integrity sha1-QFQRqOfmM5/mTbmiNN4R3DHgK9Q=
+
 tmp@^0.0.33:
   version "0.0.33"
   resolved "https://registry.yarnpkg.com/tmp/-/tmp-0.0.33.tgz#6d34335889768d21b2bcda0aa277ced3b1bfadf9"
@@ -8185,10 +8334,10 @@ trim-right@^1.0.1:
   dependencies:
     glob "^6.0.4"
 
-ts-loader@^4.3.0:
-  version "4.4.2"
-  resolved "https://registry.yarnpkg.com/ts-loader/-/ts-loader-4.4.2.tgz#778d4464b24436873c78f7f9e914d88194c2a248"
-  integrity sha512-Z3Y1a7A0KZZ1s/mAZkt74l1NAF7Y5xUhD1V9VB8/1eUlUOk8Qa/oo46tO2Uu5kQ3wXypOlbv77lLQySjXEDcdw==
+ts-loader@^5.3.0:
+  version "5.3.0"
+  resolved "https://registry.yarnpkg.com/ts-loader/-/ts-loader-5.3.0.tgz#4bac24e57bc5189391ab14987d9898ce53ef5cf7"
+  integrity sha512-lGSNs7szRFj/rK9T1EQuayE3QNLg6izDUxt5jpmq0RG1rU2bapAt7E7uLckLCUPeO1jwxCiet2oRaWovc53UAg==
   dependencies:
     chalk "^2.3.0"
     enhanced-resolve "^4.0.0"
@@ -8369,6 +8518,11 @@ unpipe@1.0.0, unpipe@~1.0.0:
   resolved "https://registry.yarnpkg.com/unpipe/-/unpipe-1.0.0.tgz#b2bf4ee8514aae6165b4817829d21b2ef49904ec"
   integrity sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw=
 
+unquote@~1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/unquote/-/unquote-1.1.1.tgz#8fded7324ec6e88a0ff8b905e7c098cdc086d544"
+  integrity sha1-j97XMk7G6IoP+LkF58CYzcCG1UQ=
+
 unset-value@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/unset-value/-/unset-value-1.0.0.tgz#8376873f7d2335179ffb1e6fc3a8ed0dfc8ab559"
@@ -8439,7 +8593,7 @@ util-deprecate@~1.0.1:
   resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
   integrity sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=
 
-util.promisify@^1.0.0:
+util.promisify@^1.0.0, util.promisify@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/util.promisify/-/util.promisify-1.0.0.tgz#440f7165a459c9a16dc145eb8e72f35687097030"
   integrity sha512-i+6qA2MPhvoKLuxnJNpXAGhg7HphQOSUq2LKMZD0m15EiskXUkMvKdF4Uui0WYeCUGea+o2cw/ZuwehtfsrNkA==
@@ -8760,11 +8914,6 @@ when@~3.6.x:
   resolved "https://registry.yarnpkg.com/when/-/when-3.6.4.tgz#473b517ec159e2b85005497a13983f095412e34e"
   integrity sha1-RztRfsFZ4rhQBUl6E5g/CVQS404=
 
-whet.extend@~0.9.9:
-  version "0.9.9"
-  resolved "https://registry.yarnpkg.com/whet.extend/-/whet.extend-0.9.9.tgz#f877d5bf648c97e5aa542fadc16d6a259b9c11a1"
-  integrity sha1-+HfVv2SMl+WqVC+twW1qJZucEaE=
-
 which-module@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/which-module/-/which-module-1.0.0.tgz#bba63ca861948994ff307736089e3b96026c2a4f"