diff --git a/index.js b/index.js
index 38f7877..ebc7162 100644
--- a/index.js
+++ b/index.js
@@ -1,17 +1,14 @@
-const csstree = require('./src/csstree');
 const order = require('./src/order');
 const scss = require('./src/stylelint');
 const stylelint = require('./src/stylelint');
 
 module.exports = {
     plugins: [
-        'stylelint-csstree-validator',
         'stylelint-order',
         'stylelint-scss'
     ],
     rules: Object.assign(
         {},
-        csstree,
         order,
         scss,
         stylelint
diff --git a/package.json b/package.json
index 9fb4a91..7d41bb3 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,6 @@
   },
   "dependencies": {
     "stylelint": "8.0.0",
-    "stylelint-csstree-validator": "1.1.1",
     "stylelint-order": "0.6.0",
     "stylelint-scss": "2.0.0"
   },
diff --git a/src/csstree.js b/src/csstree.js
deleted file mode 100644
index a42b287..0000000
--- a/src/csstree.js
+++ /dev/null
@@ -1,3 +0,0 @@
-module.exports = {
-    'csstree/validator': true
-};
diff --git a/yarn.lock b/yarn.lock
index a277d52..334c16d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,13 +2,6 @@
 # yarn lockfile v1
 
 
-JSONStream@^0.8.4:
-  version "0.8.4"
-  resolved "https://registry.yarnpkg.com/JSONStream/-/JSONStream-0.8.4.tgz#91657dfe6ff857483066132b4618b62e8f4887bd"
-  dependencies:
-    jsonparse "0.0.5"
-    through ">=2.2.7 <3"
-
 acorn-jsx@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-3.0.1.tgz#afdf9488fb1ecefc8348f6fb22f464e32a58b36b"
@@ -34,10 +27,6 @@ ajv@^4.7.0:
     co "^4.6.0"
     json-stable-stringify "^1.0.1"
 
-amdefine@>=0.0.4:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/amdefine/-/amdefine-1.0.1.tgz#4a5282ac164729e93619bcfd3ad151f817ce91f5"
-
 ansi-escapes@^1.1.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/ansi-escapes/-/ansi-escapes-1.4.0.tgz#d3a8a83b319aa67793662b13e761c7911422306e"
@@ -76,10 +65,6 @@ arr-flatten@^1.0.1:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/arr-flatten/-/arr-flatten-1.1.0.tgz#36048bbff4e7b47e136644316c99669ea5ae91f1"
 
-array-differ@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/array-differ/-/array-differ-1.0.0.tgz#eff52e3758249d33be402b8bb8e564bb2b5d4031"
-
 array-find-index@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/array-find-index/-/array-find-index-1.0.2.tgz#df010aa1287e164bbda6f9723b0a96a1ec4187a1"
@@ -102,17 +87,6 @@ arrify@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/arrify/-/arrify-1.0.1.tgz#898508da2226f380df904728456849c1501a4b0d"
 
-autoprefixer@^6.0.0:
-  version "6.7.7"
-  resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-6.7.7.tgz#1dbd1c835658e35ce3f9984099db00585c782014"
-  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@^7.1.2:
   version "7.1.2"
   resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-7.1.2.tgz#fbeaf07d48fd878e0682bf7cbeeade728adb2b18"
@@ -182,10 +156,6 @@ babylon@^6.0.18, babylon@^6.17.2:
   version "6.17.4"
   resolved "https://registry.yarnpkg.com/babylon/-/babylon-6.17.4.tgz#3e8b7402b88d22c3423e137a1577883b15ff869a"
 
-balanced-match@^0.4.0:
-  version "0.4.2"
-  resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-0.4.2.tgz#cb3f3e3c732dc0f01ee70b403f302e61d7709838"
-
 balanced-match@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
@@ -205,13 +175,6 @@ braces@^1.8.2:
     preserve "^0.2.0"
     repeat-element "^1.1.2"
 
-browserslist@^1.1.1, browserslist@^1.1.3, browserslist@^1.7.6:
-  version "1.7.7"
-  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-1.7.7.tgz#0bd76704258be829b2398bb50e4b62d1a166b0b9"
-  dependencies:
-    caniuse-db "^1.0.30000639"
-    electron-to-chromium "^1.2.7"
-
 browserslist@^2.1.5:
   version "2.2.2"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-2.2.2.tgz#e9b4618b8a01c193f9786beea09f6fd10dbe31c3"
@@ -240,14 +203,10 @@ camelcase-keys@^2.0.0:
     camelcase "^2.0.0"
     map-obj "^1.0.0"
 
-camelcase@^2.0.0, camelcase@^2.0.1:
+camelcase@^2.0.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-2.1.1.tgz#7c1d16d679a1bbe59ca02cacecfb011e201f5a1f"
 
-caniuse-db@^1.0.30000187, caniuse-db@^1.0.30000634, caniuse-db@^1.0.30000639:
-  version "1.0.30000708"
-  resolved "https://registry.yarnpkg.com/caniuse-db/-/caniuse-db-1.0.30000708.tgz#c2e736bd3b7fc5f6c14e4c6dfe62b98ed15e8a5b"
-
 caniuse-lite@^1.0.30000697, caniuse-lite@^1.0.30000704:
   version "1.0.30000708"
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000708.tgz#71dbf388c57f379b1bb66c89a890edc04c2509b6"
@@ -291,14 +250,6 @@ cli@~1.0.0:
     exit "0.1.2"
     glob "^7.1.1"
 
-cliui@^3.0.3:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/cliui/-/cliui-3.2.0.tgz#120601537a916d29940f934da3b48d585a39213d"
-  dependencies:
-    string-width "^1.0.1"
-    strip-ansi "^3.0.1"
-    wrap-ansi "^2.0.0"
-
 clone-regexp@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/clone-regexp/-/clone-regexp-1.0.0.tgz#eae0a2413f55c0942f818c229fefce845d7f3b1c"
@@ -320,29 +271,10 @@ color-convert@^1.9.0:
   dependencies:
     color-name "^1.1.1"
 
-color-diff@^0.1.3:
-  version "0.1.7"
-  resolved "https://registry.yarnpkg.com/color-diff/-/color-diff-0.1.7.tgz#6db78cd9482a8e459d40821eaf4b503283dcb8e2"
-
 color-name@^1.1.1:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.3.tgz#a7d0558bd89c42f795dd42328f740831ca53bc25"
 
-colorguard@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/colorguard/-/colorguard-1.2.0.tgz#f3facaf5caaeba4ef54653d9fb25bb73177c0d84"
-  dependencies:
-    chalk "^1.1.1"
-    color-diff "^0.1.3"
-    log-symbols "^1.0.2"
-    object-assign "^4.0.1"
-    pipetteur "^2.0.0"
-    plur "^2.0.0"
-    postcss "^5.0.4"
-    postcss-reporter "^1.2.1"
-    text-table "^0.2.0"
-    yargs "^1.2.6"
-
 concat-map@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
@@ -373,7 +305,7 @@ core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
 
-cosmiconfig@^2.1.1, cosmiconfig@^2.1.3:
+cosmiconfig@^2.1.3:
   version "2.2.2"
   resolved "https://registry.yarnpkg.com/cosmiconfig/-/cosmiconfig-2.2.2.tgz#6173cebd56fac042c1f4390edf7af6c07c7cb892"
   dependencies:
@@ -385,32 +317,6 @@ cosmiconfig@^2.1.1, cosmiconfig@^2.1.3:
     parse-json "^2.2.0"
     require-from-string "^1.1.0"
 
-css-color-names@0.0.3:
-  version "0.0.3"
-  resolved "https://registry.yarnpkg.com/css-color-names/-/css-color-names-0.0.3.tgz#de0cef16f4d8aa8222a320d5b6d7e9bbada7b9f6"
-
-css-rule-stream@^1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/css-rule-stream/-/css-rule-stream-1.1.0.tgz#3786e7198983d965a26e31957e09078cbb7705a2"
-  dependencies:
-    css-tokenize "^1.0.1"
-    duplexer2 "0.0.2"
-    ldjson-stream "^1.2.1"
-    through2 "^0.6.3"
-
-css-tokenize@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/css-tokenize/-/css-tokenize-1.0.1.tgz#4625cb1eda21c143858b7f81d6803c1d26fc14be"
-  dependencies:
-    inherits "^2.0.1"
-    readable-stream "^1.0.33"
-
-css-tree@1.0.0-alpha16:
-  version "1.0.0-alpha16"
-  resolved "https://registry.yarnpkg.com/css-tree/-/css-tree-1.0.0-alpha16.tgz#6cb2cdff6947259dfdaf790626333a862de948b0"
-  dependencies:
-    source-map "^0.5.3"
-
 currently-unhandled@^0.4.1:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/currently-unhandled/-/currently-unhandled-0.4.1.tgz#988df33feab191ef799a61369dd76c17adf957ea"
@@ -427,13 +333,13 @@ date-now@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/date-now/-/date-now-0.1.4.tgz#eaf439fd4d4848ad74e5cc7dbef200672b9e345b"
 
-debug@^2.1.1, debug@^2.2.0, debug@^2.6.0, debug@^2.6.8:
+debug@^2.1.1, debug@^2.2.0, debug@^2.6.8:
   version "2.6.8"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.8.tgz#e731531ca2ede27d188222427da17821d68ff4fc"
   dependencies:
     ms "2.0.0"
 
-decamelize@^1.1.1, decamelize@^1.1.2:
+decamelize@^1.1.2:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
 
@@ -460,23 +366,6 @@ doctrine@1.5.0, doctrine@^1.2.2:
     esutils "^2.0.2"
     isarray "^1.0.0"
 
-doiuse@^2.4.1:
-  version "2.6.0"
-  resolved "https://registry.yarnpkg.com/doiuse/-/doiuse-2.6.0.tgz#1892d10b61a9a356addbf2b614933e81f8bb3834"
-  dependencies:
-    browserslist "^1.1.1"
-    caniuse-db "^1.0.30000187"
-    css-rule-stream "^1.1.0"
-    duplexer2 "0.0.2"
-    jsonfilter "^1.1.2"
-    ldjson-stream "^1.2.1"
-    lodash "^4.0.0"
-    multimatch "^2.0.0"
-    postcss "^5.0.8"
-    source-map "^0.4.2"
-    through2 "^0.6.3"
-    yargs "^3.5.4"
-
 dom-serializer@0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/dom-serializer/-/dom-serializer-0.1.0.tgz#073c697546ce0780ce23be4a28e293e40bc30c82"
@@ -505,17 +394,7 @@ domutils@1.5:
     dom-serializer "0"
     domelementtype "1"
 
-duplexer2@0.0.2:
-  version "0.0.2"
-  resolved "https://registry.yarnpkg.com/duplexer2/-/duplexer2-0.0.2.tgz#c614dcf67e2fb14995a91711e5a617e8a60a31db"
-  dependencies:
-    readable-stream "~1.1.9"
-
-duplexer@~0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/duplexer/-/duplexer-0.1.1.tgz#ace6ff808c1ce66b57d1ebf97977acb02334cfc1"
-
-electron-to-chromium@^1.2.7, electron-to-chromium@^1.3.16:
+electron-to-chromium@^1.3.16:
   version "1.3.16"
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.16.tgz#d0e026735754770901ae301a21664cba45d92f7d"
 
@@ -864,10 +743,6 @@ function-bind@^1.0.2:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.0.tgz#16176714c801798e4e8f2cf7f7529467bb4a5771"
 
-gather-stream@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/gather-stream/-/gather-stream-1.0.0.tgz#b33994af457a8115700d410f317733cbe7a0904b"
-
 generate-function@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/generate-function/-/generate-function-2.0.0.tgz#6858fe7c0969b7d4e9093337647ac79f60dfbe74"
@@ -882,7 +757,7 @@ get-stdin@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-4.0.1.tgz#b968c6b0a04384324902e8bf1a5df32579a450fe"
 
-get-stdin@^5.0.0, get-stdin@^5.0.1:
+get-stdin@^5.0.1:
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-5.0.1.tgz#122e161591e21ff4c52530305693f20e6393a398"
 
@@ -925,7 +800,7 @@ globby@^5.0.0:
     pify "^2.0.0"
     pinkie-promise "^2.0.0"
 
-globby@^6.0.0, globby@^6.1.0:
+globby@^6.1.0:
   version "6.1.0"
   resolved "https://registry.yarnpkg.com/globby/-/globby-6.1.0.tgz#f5a6d70e8395e21c858fb0489d64df02424d506c"
   dependencies:
@@ -1006,7 +881,7 @@ inflight@^1.0.4:
     once "^1.3.0"
     wrappy "1"
 
-inherits@2, inherits@^2.0.1, inherits@^2.0.3, inherits@~2.0.1, inherits@~2.0.3:
+inherits@2, inherits@^2.0.3, inherits@~2.0.1, inherits@~2.0.3:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
 
@@ -1038,14 +913,6 @@ invariant@^2.2.0:
   dependencies:
     loose-envify "^1.0.0"
 
-invert-kv@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/invert-kv/-/invert-kv-1.0.0.tgz#104a8e4aaca6d3d8cd157a8ef8bfab2d7a3ffdb6"
-
-irregular-plurals@^1.0.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/irregular-plurals/-/irregular-plurals-1.3.0.tgz#7af06931bdf74be33dcf585a13e06fccc16caecf"
-
 is-arrayish@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/is-arrayish/-/is-arrayish-0.2.1.tgz#77c99840527aa8ecb1a8ba697b80645a7a926a9d"
@@ -1219,23 +1086,10 @@ json-stable-stringify@^1.0.0, json-stable-stringify@^1.0.1:
   dependencies:
     jsonify "~0.0.0"
 
-jsonfilter@^1.1.2:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/jsonfilter/-/jsonfilter-1.1.2.tgz#21ef7cedc75193813c75932e96a98be205ba5a11"
-  dependencies:
-    JSONStream "^0.8.4"
-    minimist "^1.1.0"
-    stream-combiner "^0.2.1"
-    through2 "^0.6.3"
-
 jsonify@~0.0.0:
   version "0.0.0"
   resolved "https://registry.yarnpkg.com/jsonify/-/jsonify-0.0.0.tgz#2c74b6ee41d93ca51b7b5aaee8f503631d252a73"
 
-jsonparse@0.0.5:
-  version "0.0.5"
-  resolved "https://registry.yarnpkg.com/jsonparse/-/jsonparse-0.0.5.tgz#330542ad3f0a654665b778f3eb2d9a9fa507ac64"
-
 jsonpointer@^4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/jsonpointer/-/jsonpointer-4.0.1.tgz#4fd92cb34e0e9db3c89c8622ecf51f9b978c6cb9"
@@ -1260,19 +1114,6 @@ known-css-properties@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/known-css-properties/-/known-css-properties-0.2.0.tgz#899c94be368e55b42d7db8d5be7d73a4a4a41454"
 
-lcid@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/lcid/-/lcid-1.0.0.tgz#308accafa0bc483a3867b4b6f2b9506251d1b835"
-  dependencies:
-    invert-kv "^1.0.0"
-
-ldjson-stream@^1.2.1:
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/ldjson-stream/-/ldjson-stream-1.2.1.tgz#91beceda5ac4ed2b17e649fb777e7abfa0189c2b"
-  dependencies:
-    split2 "^0.2.1"
-    through2 "^0.6.1"
-
 levn@^0.3.0, levn@~0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/levn/-/levn-0.3.0.tgz#3b09924edf9f083c0490fdd4c0bc4421e04764ee"
@@ -1349,11 +1190,11 @@ map-obj@^1.0.0, map-obj@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/map-obj/-/map-obj-1.0.1.tgz#d933ceb9205d82bdcf4886f6742bdc2b4dea146d"
 
-mathml-tag-names@^2.0.0, mathml-tag-names@^2.0.1:
+mathml-tag-names@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/mathml-tag-names/-/mathml-tag-names-2.0.1.tgz#8d41268168bf86d1102b98109e28e531e7a34578"
 
-meow@^3.3.0, meow@^3.7.0:
+meow@^3.7.0:
   version "3.7.0"
   resolved "https://registry.yarnpkg.com/meow/-/meow-3.7.0.tgz#72cb668b425228290abbfa856892587308a801fb"
   dependencies:
@@ -1386,7 +1227,7 @@ micromatch@^2.3.11:
     parse-glob "^3.0.4"
     regex-cache "^0.4.2"
 
-minimatch@^3.0.0, minimatch@^3.0.2, minimatch@^3.0.3, minimatch@^3.0.4, minimatch@~3.0.2:
+minimatch@^3.0.2, minimatch@^3.0.3, minimatch@^3.0.4, minimatch@~3.0.2:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
   dependencies:
@@ -1396,7 +1237,7 @@ minimist@0.0.8:
   version "0.0.8"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
 
-minimist@^1.1.0, minimist@^1.1.3, minimist@^1.2.0:
+minimist@^1.1.3, minimist@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
 
@@ -1410,15 +1251,6 @@ ms@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
 
-multimatch@^2.0.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/multimatch/-/multimatch-2.1.0.tgz#9c7906a22fb4c02919e2f5f75161b4cdbd4b2a2b"
-  dependencies:
-    array-differ "^1.0.0"
-    array-union "^1.0.1"
-    arrify "^1.0.0"
-    minimatch "^3.0.0"
-
 mute-stream@0.0.5:
   version "0.0.5"
   resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.5.tgz#8fbfabb0a98a253d3184331f9e8deb7372fac6c0"
@@ -1475,10 +1307,6 @@ once@^1.3.0:
   dependencies:
     wrappy "1"
 
-onecolor@^3.0.4:
-  version "3.0.4"
-  resolved "https://registry.yarnpkg.com/onecolor/-/onecolor-3.0.4.tgz#75a46f80da6c7aaa5b4daae17a47198bd9652494"
-
 onetime@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/onetime/-/onetime-1.1.0.tgz#a1f7838f8314c516f05ecefcbc4ccfe04b4ed789"
@@ -1498,12 +1326,6 @@ os-homedir@^1.0.0, os-homedir@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/os-homedir/-/os-homedir-1.0.2.tgz#ffbc4988336e0e833de0c168c7ef152121aa7fb3"
 
-os-locale@^1.4.0:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/os-locale/-/os-locale-1.4.0.tgz#20f9f17ae29ed345e8bde583b13d2009803c14d9"
-  dependencies:
-    lcid "^1.0.0"
-
 parse-glob@^3.0.4:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/parse-glob/-/parse-glob-3.0.4.tgz#b2c376cfb11f35513badd173ef0bb6e3a388391c"
@@ -1545,7 +1367,7 @@ path-type@^1.0.0:
     pify "^2.0.0"
     pinkie-promise "^2.0.0"
 
-pify@^2.0.0, pify@^2.3.0:
+pify@^2.0.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/pify/-/pify-2.3.0.tgz#ed141a6ac043a849ea588498e7dca8b15330e90c"
 
@@ -1563,13 +1385,6 @@ pinkie@^2.0.0:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/pinkie/-/pinkie-2.0.4.tgz#72556b80cfa0d48a974e80e77248e80ed4f7f870"
 
-pipetteur@^2.0.0:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/pipetteur/-/pipetteur-2.0.3.tgz#1955760959e8d1a11cb2a50ec83eec470633e49f"
-  dependencies:
-    onecolor "^3.0.4"
-    synesthesia "^1.0.1"
-
 pkg-dir@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/pkg-dir/-/pkg-dir-1.0.0.tgz#7a4b508a8d5bb2d629d447056ff4e9c9314cf3d4"
@@ -1582,50 +1397,20 @@ pkg-up@^1.0.0:
   dependencies:
     find-up "^1.0.0"
 
-plur@^2.0.0, plur@^2.1.2:
-  version "2.1.2"
-  resolved "https://registry.yarnpkg.com/plur/-/plur-2.1.2.tgz#7482452c1a0f508e3e344eaec312c91c29dc655a"
-  dependencies:
-    irregular-plurals "^1.0.0"
-
 pluralize@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/pluralize/-/pluralize-1.2.1.tgz#d1a21483fd22bb41e58a12fa3421823140897c45"
 
-postcss-less@^0.14.0:
-  version "0.14.0"
-  resolved "https://registry.yarnpkg.com/postcss-less/-/postcss-less-0.14.0.tgz#c631b089c6cce422b9a10f3a958d2bedd3819324"
-  dependencies:
-    postcss "^5.0.21"
-
 postcss-less@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/postcss-less/-/postcss-less-1.1.0.tgz#bdcc76be64c4324d873fbc5cd9fa2e799e4305fa"
   dependencies:
     postcss "^5.2.16"
 
-postcss-media-query-parser@^0.2.0, postcss-media-query-parser@^0.2.3:
+postcss-media-query-parser@^0.2.3:
   version "0.2.3"
   resolved "https://registry.yarnpkg.com/postcss-media-query-parser/-/postcss-media-query-parser-0.2.3.tgz#27b39c6f4d94f81b1a73b8f76351c609e5cef244"
 
-postcss-reporter@^1.2.1, postcss-reporter@^1.3.3:
-  version "1.4.1"
-  resolved "https://registry.yarnpkg.com/postcss-reporter/-/postcss-reporter-1.4.1.tgz#c136f0a5b161915f379dd3765c61075f7e7b9af2"
-  dependencies:
-    chalk "^1.0.0"
-    lodash "^4.1.0"
-    log-symbols "^1.0.2"
-    postcss "^5.0.0"
-
-postcss-reporter@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/postcss-reporter/-/postcss-reporter-3.0.0.tgz#09ea0f37a444c5693878606e09b018ebeff7cf8f"
-  dependencies:
-    chalk "^1.0.0"
-    lodash "^4.1.0"
-    log-symbols "^1.0.2"
-    postcss "^5.0.0"
-
 postcss-reporter@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/postcss-reporter/-/postcss-reporter-4.0.0.tgz#13356c365c36783adde88e28e09dbba6ec6c6501"
@@ -1638,19 +1423,13 @@ postcss-resolve-nested-selector@^0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/postcss-resolve-nested-selector/-/postcss-resolve-nested-selector-0.1.1.tgz#29ccbc7c37dedfac304e9fff0bf1596b3f6a0e4e"
 
-postcss-scss@^0.4.0:
-  version "0.4.1"
-  resolved "https://registry.yarnpkg.com/postcss-scss/-/postcss-scss-0.4.1.tgz#ad771b81f0f72f5f4845d08aa60f93557653d54c"
-  dependencies:
-    postcss "^5.2.13"
-
 postcss-scss@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/postcss-scss/-/postcss-scss-1.0.2.tgz#ff45cf3354b879ee89a4eb68680f46ac9bb14f94"
   dependencies:
     postcss "^6.0.3"
 
-postcss-selector-parser@^2.0.0, postcss-selector-parser@^2.1.1, postcss-selector-parser@^2.2.3:
+postcss-selector-parser@^2.0.0, postcss-selector-parser@^2.2.3:
   version "2.2.3"
   resolved "https://registry.yarnpkg.com/postcss-selector-parser/-/postcss-selector-parser-2.2.3.tgz#f9437788606c3c9acee16ffe8d8b16297f27bb90"
   dependencies:
@@ -1665,11 +1444,11 @@ postcss-sorting@^3.0.1:
     lodash "^4.17.4"
     postcss "^6.0.1"
 
-postcss-value-parser@^3.1.1, postcss-value-parser@^3.2.3, postcss-value-parser@^3.3.0:
+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"
 
-postcss@^5.0.0, postcss@^5.0.18, postcss@^5.0.20, postcss@^5.0.21, postcss@^5.0.4, postcss@^5.0.8, postcss@^5.2.13, postcss@^5.2.16, postcss@^5.2.4:
+postcss@^5.2.16:
   version "5.2.17"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-5.2.17.tgz#cf4f597b864d65c8a492b2eabe9d706c879c388b"
   dependencies:
@@ -1713,12 +1492,6 @@ randomatic@^1.1.3:
     is-number "^3.0.0"
     kind-of "^4.0.0"
 
-read-file-stdin@^0.2.1:
-  version "0.2.1"
-  resolved "https://registry.yarnpkg.com/read-file-stdin/-/read-file-stdin-0.2.1.tgz#25eccff3a153b6809afacb23ee15387db9e0ee61"
-  dependencies:
-    gather-stream "^1.0.0"
-
 read-pkg-up@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/read-pkg-up/-/read-pkg-up-1.0.1.tgz#9d63c13276c065918d57f002a57f40a1b643fb02"
@@ -1734,7 +1507,7 @@ read-pkg@^1.0.0:
     normalize-package-data "^2.3.2"
     path-type "^1.0.0"
 
-readable-stream@1.1, readable-stream@^1.0.33, readable-stream@~1.1.9:
+readable-stream@1.1:
   version "1.1.14"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.1.14.tgz#7cf4c54ef648e3813084c636dd2079e166c081d9"
   dependencies:
@@ -1743,15 +1516,6 @@ readable-stream@1.1, readable-stream@^1.0.33, readable-stream@~1.1.9:
     isarray "0.0.1"
     string_decoder "~0.10.x"
 
-"readable-stream@>=1.0.33-1 <1.1.0-0":
-  version "1.0.34"
-  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.0.34.tgz#125820e34bc842d2f2aaafafe4c2916ee32c157c"
-  dependencies:
-    core-util-is "~1.0.0"
-    inherits "~2.0.1"
-    isarray "0.0.1"
-    string_decoder "~0.10.x"
-
 readable-stream@^2.2.2:
   version "2.3.3"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.3.tgz#368f2512d79f9d46fdfc71349ae7878bbc1eb95c"
@@ -1894,13 +1658,7 @@ slice-ansi@0.0.4:
   version "0.0.4"
   resolved "https://registry.yarnpkg.com/slice-ansi/-/slice-ansi-0.0.4.tgz#edbf8903f66f7ce2f8eafd6ceed65e264c831b35"
 
-source-map@^0.4.2:
-  version "0.4.4"
-  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.4.4.tgz#eba4f5da9c0dc999de68032d8b4f76173652036b"
-  dependencies:
-    amdefine ">=0.0.4"
-
-source-map@^0.5.3, source-map@^0.5.6:
+source-map@^0.5.6:
   version "0.5.6"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.6.tgz#75ce38f52bf0733c5a7f0c118d81334a2bb5f412"
 
@@ -1918,27 +1676,14 @@ spdx-license-ids@^1.0.2:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/spdx-license-ids/-/spdx-license-ids-1.2.2.tgz#c9df7a3424594ade6bd11900d596696dc06bac57"
 
-specificity@^0.3.0, specificity@^0.3.1:
+specificity@^0.3.1:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/specificity/-/specificity-0.3.1.tgz#f1b068424ce317ae07478d95de3c21cf85e8d567"
 
-split2@^0.2.1:
-  version "0.2.1"
-  resolved "https://registry.yarnpkg.com/split2/-/split2-0.2.1.tgz#02ddac9adc03ec0bb78c1282ec079ca6e85ae900"
-  dependencies:
-    through2 "~0.6.1"
-
 sprintf-js@~1.0.2:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.0.3.tgz#04e6926f662895354f3dd015203633b857297e2c"
 
-stream-combiner@^0.2.1:
-  version "0.2.2"
-  resolved "https://registry.yarnpkg.com/stream-combiner/-/stream-combiner-0.2.2.tgz#aec8cbac177b56b6f4fa479ced8c1912cee52858"
-  dependencies:
-    duplexer "~0.1.1"
-    through "~2.3.4"
-
 string-width@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/string-width/-/string-width-1.0.2.tgz#118bdf5b8cdc51a2a7e70d211e07e2b0b9b107d3"
@@ -1964,7 +1709,7 @@ string_decoder@~1.0.3:
   dependencies:
     safe-buffer "~5.1.0"
 
-strip-ansi@^3.0.0, strip-ansi@^3.0.1:
+strip-ansi@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-3.0.1.tgz#6a385fb8853d952d5ff05d0e8aaf94278dc63dcf"
   dependencies:
@@ -2004,29 +1749,6 @@ style-search@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/style-search/-/style-search-0.1.0.tgz#7958c793e47e32e07d2b5cafe5c0bf8e12e77902"
 
-stylehacks@^2.3.2:
-  version "2.3.2"
-  resolved "https://registry.yarnpkg.com/stylehacks/-/stylehacks-2.3.2.tgz#64c83e0438a68c9edf449e8c552a7d9ab6009b0b"
-  dependencies:
-    browserslist "^1.1.3"
-    chalk "^1.1.1"
-    log-symbols "^1.0.2"
-    minimist "^1.2.0"
-    plur "^2.1.2"
-    postcss "^5.0.18"
-    postcss-reporter "^1.3.3"
-    postcss-selector-parser "^2.0.0"
-    read-file-stdin "^0.2.1"
-    text-table "^0.2.0"
-    write-file-stdout "0.0.2"
-
-stylelint-csstree-validator@1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/stylelint-csstree-validator/-/stylelint-csstree-validator-1.1.1.tgz#ed3a1e2c482df50644731fcf557e2dffa9d8dc7f"
-  dependencies:
-    css-tree "1.0.0-alpha16"
-    stylelint "^7.0.0"
-
 stylelint-order@0.6.0:
   version "0.6.0"
   resolved "https://registry.yarnpkg.com/stylelint-order/-/stylelint-order-0.6.0.tgz#72222be0c64d8782b2fc237d0d9ac974039f968b"
@@ -2087,56 +1809,6 @@ stylelint@8.0.0, stylelint@^8.0.0:
     svg-tags "^1.0.0"
     table "^4.0.1"
 
-stylelint@^7.0.0:
-  version "7.13.0"
-  resolved "https://registry.yarnpkg.com/stylelint/-/stylelint-7.13.0.tgz#111f97b6da72e775c80800d6bb6f5f869997785d"
-  dependencies:
-    autoprefixer "^6.0.0"
-    balanced-match "^0.4.0"
-    chalk "^2.0.1"
-    colorguard "^1.2.0"
-    cosmiconfig "^2.1.1"
-    debug "^2.6.0"
-    doiuse "^2.4.1"
-    execall "^1.0.0"
-    file-entry-cache "^2.0.0"
-    get-stdin "^5.0.0"
-    globby "^6.0.0"
-    globjoin "^0.1.4"
-    html-tags "^2.0.0"
-    ignore "^3.2.0"
-    imurmurhash "^0.1.4"
-    known-css-properties "^0.2.0"
-    lodash "^4.17.4"
-    log-symbols "^1.0.2"
-    mathml-tag-names "^2.0.0"
-    meow "^3.3.0"
-    micromatch "^2.3.11"
-    normalize-selector "^0.2.0"
-    pify "^2.3.0"
-    postcss "^5.0.20"
-    postcss-less "^0.14.0"
-    postcss-media-query-parser "^0.2.0"
-    postcss-reporter "^3.0.0"
-    postcss-resolve-nested-selector "^0.1.1"
-    postcss-scss "^0.4.0"
-    postcss-selector-parser "^2.1.1"
-    postcss-value-parser "^3.1.1"
-    resolve-from "^3.0.0"
-    specificity "^0.3.0"
-    string-width "^2.0.0"
-    style-search "^0.1.0"
-    stylehacks "^2.3.2"
-    sugarss "^0.2.0"
-    svg-tags "^1.0.0"
-    table "^4.0.1"
-
-sugarss@^0.2.0:
-  version "0.2.0"
-  resolved "https://registry.yarnpkg.com/sugarss/-/sugarss-0.2.0.tgz#ac34237563327c6ff897b64742bf6aec190ad39e"
-  dependencies:
-    postcss "^5.2.4"
-
 sugarss@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/sugarss/-/sugarss-1.0.0.tgz#65e51b3958432fb70d5451a68bb33e32d0cf1ef7"
@@ -2163,12 +1835,6 @@ svg-tags@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/svg-tags/-/svg-tags-1.0.0.tgz#58f71cee3bd519b59d4b2a843b6c7de64ac04764"
 
-synesthesia@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/synesthesia/-/synesthesia-1.0.1.tgz#5ef95ea548c0d5c6e6f9bb4b0d0731dff864a777"
-  dependencies:
-    css-color-names "0.0.3"
-
 table@^3.7.8:
   version "3.8.3"
   resolved "https://registry.yarnpkg.com/table/-/table-3.8.3.tgz#2bbc542f0fda9861a755d3947fefd8b3f513855f"
@@ -2191,18 +1857,11 @@ table@^4.0.1:
     slice-ansi "0.0.4"
     string-width "^2.0.0"
 
-text-table@^0.2.0, text-table@~0.2.0:
+text-table@~0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
 
-through2@^0.6.1, through2@^0.6.3, through2@~0.6.1:
-  version "0.6.5"
-  resolved "https://registry.yarnpkg.com/through2/-/through2-0.6.5.tgz#41ab9c67b29d57209071410e1d7a7a968cd3ad48"
-  dependencies:
-    readable-stream ">=1.0.33-1 <1.1.0-0"
-    xtend ">=4.0.0 <4.1.0-0"
-
-"through@>=2.2.7 <3", through@^2.3.6, through@~2.3.4:
+through@^2.3.6:
   version "2.3.8"
   resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
 
@@ -2249,55 +1908,20 @@ validate-npm-package-license@^3.0.1:
     spdx-correct "~1.0.0"
     spdx-expression-parse "~1.0.0"
 
-window-size@^0.1.4:
-  version "0.1.4"
-  resolved "https://registry.yarnpkg.com/window-size/-/window-size-0.1.4.tgz#f8e1aa1ee5a53ec5bf151ffa09742a6ad7697876"
-
 wordwrap@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-1.0.0.tgz#27584810891456a4171c8d0226441ade90cbcaeb"
 
-wrap-ansi@^2.0.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-2.1.0.tgz#d8fc3d284dd05794fe84973caecdd1cf824fdd85"
-  dependencies:
-    string-width "^1.0.1"
-    strip-ansi "^3.0.1"
-
 wrappy@1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
 
-write-file-stdout@0.0.2:
-  version "0.0.2"
-  resolved "https://registry.yarnpkg.com/write-file-stdout/-/write-file-stdout-0.0.2.tgz#c252d7c7c5b1b402897630e3453c7bfe690d9ca1"
-
 write@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/write/-/write-0.2.1.tgz#5fc03828e264cea3fe91455476f7a3c566cb0757"
   dependencies:
     mkdirp "^0.5.1"
 
-"xtend@>=4.0.0 <4.1.0-0", xtend@^4.0.0:
+xtend@^4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.1.tgz#a5c6d532be656e23db820efb943a1f04998d63af"
-
-y18n@^3.2.0:
-  version "3.2.1"
-  resolved "https://registry.yarnpkg.com/y18n/-/y18n-3.2.1.tgz#6d15fba884c08679c0d77e88e7759e811e07fa41"
-
-yargs@^1.2.6:
-  version "1.3.3"
-  resolved "https://registry.yarnpkg.com/yargs/-/yargs-1.3.3.tgz#054de8b61f22eefdb7207059eaef9d6b83fb931a"
-
-yargs@^3.5.4:
-  version "3.32.0"
-  resolved "https://registry.yarnpkg.com/yargs/-/yargs-3.32.0.tgz#03088e9ebf9e756b69751611d2a5ef591482c995"
-  dependencies:
-    camelcase "^2.0.1"
-    cliui "^3.0.3"
-    decamelize "^1.1.1"
-    os-locale "^1.4.0"
-    string-width "^1.0.1"
-    window-size "^0.1.4"
-    y18n "^3.2.0"