🐛 re-add broccoli-clean-css

no issue
- `broccoli-clean-css` is used to compress codemirror CSS files so it's still needed
- update usage in `ember-cli-build.js` to match 2.0's class interface

ember-cli-build.js

@@ -5,7 +5,7 @@ var EmberApp = require('ember-cli/lib/broccoli/ember-app'),
     concat = require('broccoli-concat'),
     mergeTrees = require('broccoli-merge-trees'),
     uglify = require('broccoli-uglify-js'),
-    cleanCSS = require('broccoli-clean-css'),
+    CleanCSS = require('broccoli-clean-css'),
     environment = EmberApp.env(),
     isProduction = environment === 'production',
     disabled = {enabled: false},
@@ -52,7 +52,7 @@ codemirrorAssets = function () {
 
                 if (isProduction) {
                     jsTree = uglify(jsTree);
-                    cssTree = cleanCSS(cssTree);
+                    cssTree = new CleanCSS(cssTree);
                 }
 
                 return mergeTrees([jsTree, cssTree]);

package.json

@@ -30,6 +30,7 @@
     "blueimp-md5": "2.7.0",
     "bower": "1.8.0",
     "broccoli-asset-rev": "2.5.0",
+    "broccoli-clean-css": "^2.0.1",
     "broccoli-concat": "3.2.2",
     "broccoli-funnel": "1.1.0",
     "broccoli-merge-trees": "1.2.1",

yarn.lock

@@ -665,15 +665,6 @@ broccoli-caching-writer@^2.0.4, broccoli-caching-writer@^2.2.0, broccoli-caching
     rsvp "^3.0.17"
     walk-sync "^0.2.5"
 
-broccoli-clean-css@2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/broccoli-clean-css/-/broccoli-clean-css-2.0.1.tgz#1bf48a43d7626522621351c696e5f9441f628db2"
-  dependencies:
-    broccoli-persistent-filter "^1.2.13"
-    clean-css-promise "^2.0.1"
-    json-stable-stringify "^1.0.1"
-    source-map-to-comment "^1.1.0"
-
 broccoli-clean-css@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/broccoli-clean-css/-/broccoli-clean-css-1.1.0.tgz#9db143d9af7e0ae79c26e3ac5a9bb2d720ea19fa"
@@ -683,6 +674,15 @@ broccoli-clean-css@^1.1.0:
     inline-source-map-comment "^1.0.5"
     json-stable-stringify "^1.0.0"
 
+broccoli-clean-css@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/broccoli-clean-css/-/broccoli-clean-css-2.0.1.tgz#1bf48a43d7626522621351c696e5f9441f628db2"
+  dependencies:
+    broccoli-persistent-filter "^1.2.13"
+    clean-css-promise "^2.0.1"
+    json-stable-stringify "^1.0.1"
+    source-map-to-comment "^1.1.0"
+
 broccoli-concat@3.2.2, broccoli-concat@^3.0.4:
   version "3.2.2"
   resolved "https://registry.yarnpkg.com/broccoli-concat/-/broccoli-concat-3.2.2.tgz#86ffdc52606eb590ba9f6b894c5ec7a016f5b7b9"