diff --git a/package.json b/package.json
index 77fb4a4..e9093e5 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
   },
   "devDependencies": {
     "coveralls": "^3.0.9",
-    "css-loader": "^3.4.2",
+    "css-loader": "^4.2.2",
     "husky": "^4.2.1",
     "jest": "^25.1.0",
     "less": "^3.0.4",
diff --git a/yarn.lock b/yarn.lock
index 95dedeb..f53a7f6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -395,6 +395,11 @@
     "@types/istanbul-lib-coverage" "*"
     "@types/istanbul-lib-report" "*"
 
+"@types/json-schema@^7.0.4":
+  version "7.0.5"
+  resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.5.tgz#dcce4430e64b443ba8945f0290fb564ad5bac6dd"
+  integrity sha512-7+2BITlgjgDhH0vvwZU/HZJVyk+2XUlvxXe8dFMedNX/aMkaOq++rMAFXc0tM7ij15QaWlbdQASBR9dihi+bDQ==
+
 "@types/parse-json@^4.0.0":
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/@types/parse-json/-/parse-json-4.0.0.tgz#2f8bb441434d163b35fb8ffdccd7138927ffb8c0"
@@ -600,6 +605,16 @@ ajv@^6.1.0, ajv@^6.10.2, ajv@^6.5.5:
     json-schema-traverse "^0.4.1"
     uri-js "^4.2.2"
 
+ajv@^6.12.2:
+  version "6.12.4"
+  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.12.4.tgz#0614facc4522127fa713445c6bfd3ebd376e2234"
+  integrity sha512-eienB2c9qVQs2KWexhkrdMLVDoIQCz5KSeLxwg9Lzk4DOfBtIK9PQwwufcsn1jjGuf9WZmqPMbGxOzfcuphJCQ==
+  dependencies:
+    fast-deep-equal "^3.1.1"
+    fast-json-stable-stringify "^2.0.0"
+    json-schema-traverse "^0.4.1"
+    uri-js "^4.2.2"
+
 amdefine@>=0.0.4:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/amdefine/-/amdefine-1.0.1.tgz#4a5282ac164729e93619bcfd3ad151f817ce91f5"
@@ -1038,6 +1053,11 @@ camelcase@^5.0.0, camelcase@^5.3.1:
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-5.3.1.tgz#e3c9b31569e106811df242f715725a1f4c494320"
   integrity sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==
 
+camelcase@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-6.0.0.tgz#5259f7c30e35e278f1bdc2a4d91230b37cad981e"
+  integrity sha512-8KMDF1Vz2gzOq54ONPJS65IvTUaB1cHJ2DMM7MbPmLZljDH1qpzzLsWdiN9pHh6qvkRVDTi/07+eNGch/oLU4w==
+
 capture-exit@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/capture-exit/-/capture-exit-2.0.0.tgz#fb953bfaebeb781f62898239dabb426d08a509a4"
@@ -1369,23 +1389,23 @@ crypto-browserify@^3.11.0:
     randombytes "^2.0.0"
     randomfill "^1.0.3"
 
-css-loader@^3.4.2:
-  version "3.4.2"
-  resolved "https://registry.yarnpkg.com/css-loader/-/css-loader-3.4.2.tgz#d3fdb3358b43f233b78501c5ed7b1c6da6133202"
-  integrity sha512-jYq4zdZT0oS0Iykt+fqnzVLRIeiPWhka+7BqPn+oSIpWJAHak5tmB/WZrJ2a21JhCeFyNnnlroSl8c+MtVndzA==
+css-loader@^4.2.2:
+  version "4.2.2"
+  resolved "https://registry.yarnpkg.com/css-loader/-/css-loader-4.2.2.tgz#b668b3488d566dc22ebcf9425c5f254a05808c89"
+  integrity sha512-omVGsTkZPVwVRpckeUnLshPp12KsmMSLqYxs12+RzM9jRR5Y+Idn/tBffjXRvOE+qW7if24cuceFJqYR5FmGBg==
   dependencies:
-    camelcase "^5.3.1"
+    camelcase "^6.0.0"
     cssesc "^3.0.0"
     icss-utils "^4.1.1"
-    loader-utils "^1.2.3"
-    normalize-path "^3.0.0"
-    postcss "^7.0.23"
+    loader-utils "^2.0.0"
+    postcss "^7.0.32"
     postcss-modules-extract-imports "^2.0.0"
-    postcss-modules-local-by-default "^3.0.2"
-    postcss-modules-scope "^2.1.1"
+    postcss-modules-local-by-default "^3.0.3"
+    postcss-modules-scope "^2.2.0"
     postcss-modules-values "^3.0.0"
-    postcss-value-parser "^4.0.2"
-    schema-utils "^2.6.0"
+    postcss-value-parser "^4.1.0"
+    schema-utils "^2.7.0"
+    semver "^7.3.2"
 
 cssesc@^3.0.0:
   version "3.0.0"
@@ -1574,6 +1594,11 @@ emojis-list@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/emojis-list/-/emojis-list-2.1.0.tgz#4daa4d9db00f9819880c79fa457ae5b09a1fd389"
 
+emojis-list@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/emojis-list/-/emojis-list-3.0.0.tgz#5570662046ad29e2e916e71aae260abdff4f6a78"
+  integrity sha512-/kyM18EfinwXZbno9FyUGeFh87KC8HRQBQGildHZbEuRyWFOmv1U10o9BBp8XVZDVNNuQKyIGIu5ZYAAXJ0V2Q==
+
 end-of-stream@^1.0.0, end-of-stream@^1.1.0:
   version "1.4.4"
   resolved "https://registry.yarnpkg.com/end-of-stream/-/end-of-stream-1.4.4.tgz#5ae64a5f45057baf3626ec14da0ca5e4b2431eb0"
@@ -3023,6 +3048,13 @@ json5@^2.1.0:
   dependencies:
     minimist "^1.2.0"
 
+json5@^2.1.2:
+  version "2.1.3"
+  resolved "https://registry.yarnpkg.com/json5/-/json5-2.1.3.tgz#c9b0f7fa9233bfe5807fe66fcf3a5617ed597d43"
+  integrity sha512-KXPvOm8K9IJKFM0bmdn8QXh7udDh1g/giieX0NLCaMnb4hEiVFqnop2ImTXCc5e0/oHz3LTqmHGtExn5hfMkOA==
+  dependencies:
+    minimist "^1.2.5"
+
 jsprim@^1.2.2:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/jsprim/-/jsprim-1.4.1.tgz#313e66bc1e5cc06e438bc1b7499c2e5c56acb6a2"
@@ -3137,6 +3169,15 @@ loader-utils@1.2.3, loader-utils@^1.1.0, loader-utils@^1.2.3:
     emojis-list "^2.0.0"
     json5 "^1.0.1"
 
+loader-utils@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/loader-utils/-/loader-utils-2.0.0.tgz#e4cace5b816d425a166b5f097e10cd12b36064b0"
+  integrity sha512-rP4F0h2RaWSvPEkD7BLDFQnvSf+nK+wr3ESUjNTyAGobqrijmW92zc+SO6d4p4B1wh7+B/Jg1mkQe5NYUEHtHQ==
+  dependencies:
+    big.js "^5.2.2"
+    emojis-list "^3.0.0"
+    json5 "^2.1.2"
+
 locate-path@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/locate-path/-/locate-path-3.0.0.tgz#dbec3b3ab759758071b58fe59fc41871af21400e"
@@ -3368,6 +3409,11 @@ minimist@^1.1.1, minimist@^1.1.3, minimist@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
 
+minimist@^1.2.5:
+  version "1.2.5"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.5.tgz#67d66014b66a6a8aaa0c083c5fd58df4e4e97602"
+  integrity sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==
+
 mississippi@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/mississippi/-/mississippi-3.0.0.tgz#ea0a3291f97e0b5e8776b363d5f0a12d94c67022"
@@ -3950,20 +3996,20 @@ postcss-modules-extract-imports@^2.0.0:
   dependencies:
     postcss "^7.0.5"
 
-postcss-modules-local-by-default@^3.0.2:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/postcss-modules-local-by-default/-/postcss-modules-local-by-default-3.0.2.tgz#e8a6561be914aaf3c052876377524ca90dbb7915"
-  integrity sha512-jM/V8eqM4oJ/22j0gx4jrp63GSvDH6v86OqyTHHUvk4/k1vceipZsaymiZ5PvocqZOl5SFHiFJqjs3la0wnfIQ==
+postcss-modules-local-by-default@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/postcss-modules-local-by-default/-/postcss-modules-local-by-default-3.0.3.tgz#bb14e0cc78279d504dbdcbfd7e0ca28993ffbbb0"
+  integrity sha512-e3xDq+LotiGesympRlKNgaJ0PCzoUIdpH0dj47iWAui/kyTgh3CiAr1qP54uodmJhl6p9rN6BoNcdEDVJx9RDw==
   dependencies:
     icss-utils "^4.1.1"
-    postcss "^7.0.16"
+    postcss "^7.0.32"
     postcss-selector-parser "^6.0.2"
-    postcss-value-parser "^4.0.0"
+    postcss-value-parser "^4.1.0"
 
-postcss-modules-scope@^2.1.1:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/postcss-modules-scope/-/postcss-modules-scope-2.1.1.tgz#33d4fc946602eb5e9355c4165d68a10727689dba"
-  integrity sha512-OXRUPecnHCg8b9xWvldG/jUpRIGPNRka0r4D4j0ESUU2/5IOnpsjfPPmDprM3Ih8CgZ8FXjWqaniK5v4rWt3oQ==
+postcss-modules-scope@^2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/postcss-modules-scope/-/postcss-modules-scope-2.2.0.tgz#385cae013cc7743f5a7d7602d1073a89eaae62ee"
+  integrity sha512-YyEgsTMRpNd+HmyC7H/mh3y+MeFWevy7V1evVhJWewmMbjDHIbZbOXICC2y+m1xI1UVfIT1HMW/O04Hxyu9oXQ==
   dependencies:
     postcss "^7.0.6"
     postcss-selector-parser "^6.0.0"
@@ -3985,15 +4031,15 @@ postcss-selector-parser@^6.0.0, postcss-selector-parser@^6.0.2:
     indexes-of "^1.0.1"
     uniq "^1.0.1"
 
-postcss-value-parser@^4.0.0, postcss-value-parser@^4.0.2:
-  version "4.0.2"
-  resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-4.0.2.tgz#482282c09a42706d1fc9a069b73f44ec08391dc9"
-  integrity sha512-LmeoohTpp/K4UiyQCwuGWlONxXamGzCMtFxLq4W1nZVGIQLYvMCJx3yAF9qyyuFpflABI9yVdtJAqbihOsCsJQ==
+postcss-value-parser@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-4.1.0.tgz#443f6a20ced6481a2bda4fa8532a6e55d789a2cb"
+  integrity sha512-97DXOFbQJhk71ne5/Mt6cOu6yxsSfM0QGQyl0L25Gca4yGWEGJaig7l7gbCX623VqTBNGLRLaVUCnNkcedlRSQ==
 
-postcss@^7.0.14, postcss@^7.0.16, postcss@^7.0.23, postcss@^7.0.5, postcss@^7.0.6:
-  version "7.0.26"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.26.tgz#5ed615cfcab35ba9bbb82414a4fa88ea10429587"
-  integrity sha512-IY4oRjpXWYshuTDFxMVkJDtWIk2LhsTlu8bZnbEJA4+bYT16Lvpo8Qv6EvDumhYRgzjZl489pmsY3qVgJQ08nA==
+postcss@^7.0.14, postcss@^7.0.32, postcss@^7.0.5, postcss@^7.0.6:
+  version "7.0.32"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.32.tgz#4310d6ee347053da3433db2be492883d62cec59d"
+  integrity sha512-03eXong5NLnNCD05xscnGKGDZ98CyzoqPSMjOe6SuoQY7Z2hIj0Ld1g/O/UQRuOle2aRtiIRDg9tDcTGAkLfKw==
   dependencies:
     chalk "^2.4.2"
     source-map "^0.6.1"
@@ -4427,12 +4473,13 @@ schema-utils@^1.0.0:
     ajv-errors "^1.0.0"
     ajv-keywords "^3.1.0"
 
-schema-utils@^2.6.0, schema-utils@^2.6.1, schema-utils@^2.6.4:
-  version "2.6.4"
-  resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-2.6.4.tgz#a27efbf6e4e78689d91872ee3ccfa57d7bdd0f53"
-  integrity sha512-VNjcaUxVnEeun6B2fiiUDjXXBtD4ZSH7pdbfIu1pOFwgptDPLMo/z9jr4sUfsjFVPqDCEin/F7IYlq7/E6yDbQ==
+schema-utils@^2.6.1, schema-utils@^2.6.4, schema-utils@^2.7.0:
+  version "2.7.0"
+  resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-2.7.0.tgz#17151f76d8eae67fbbf77960c33c676ad9f4efc7"
+  integrity sha512-0ilKFI6QQF5nxDZLFn2dMjvc4hjg/Wkg7rHd3jK6/A4a1Hl9VFdQWvgB1UMGoU94pad1P/8N7fMcEnLnSiju8A==
   dependencies:
-    ajv "^6.10.2"
+    "@types/json-schema" "^7.0.4"
+    ajv "^6.12.2"
     ajv-keywords "^3.4.1"
 
 scss-tokenizer@^0.2.3:
@@ -4460,10 +4507,10 @@ semver@^6.0.0, semver@^6.3.0:
   version "6.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
 
-semver@^7.1.1:
-  version "7.1.2"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-7.1.2.tgz#847bae5bce68c5d08889824f02667199b70e3d87"
-  integrity sha512-BJs9T/H8sEVHbeigqzIEo57Iu/3DG6c4QoqTfbQB3BPA4zgzAomh/Fk9E7QtjWQ8mx2dgA9YCfSF4y9k9bHNpQ==
+semver@^7.1.1, semver@^7.3.2:
+  version "7.3.2"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.2.tgz#604962b052b81ed0786aae84389ffba70ffd3938"
+  integrity sha512-OrOb32TeeambH6UrhtShmF7CRDqhL6/5XpPNp2DuRH6+9QLw/orhp72j87v8Qa1ScDkvrrBNpZcDejAirJmfXQ==
 
 semver@~5.3.0:
   version "5.3.0"