Update dependency postcss to v8

Author: renovate[bot]

package.json

@@ -57,7 +57,7 @@
     "css-property-parser": "^1.0.6",
     "gzip-size": "^5.0.0",
     "lodash.isplainobject": "^4.0.6",
-    "postcss": "^6.0.22",
+    "postcss": "^8.0.0",
     "postcss-safe-parser": "^3.0.1",
     "postcss-selector-parser": "^5.0.0-rc.3",
     "postcss-values-parser": "^1.5.0"

yarn.lock

@@ -3504,6 +3504,11 @@ nan@^2.9.2:
   version "2.10.0"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.10.0.tgz#96d0cd610ebd58d4b4de9cc0c6828cda99c7548f"
 
+nanoid@^3.3.7:
+  version "3.3.8"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.8.tgz#b1be3030bee36aaff18bacb375e5cce521684baf"
+  integrity sha512-WNLf5Sd8oZxOm+TzppcYk8gVOgP+l58xNy58D0nbUnOxOWRWvlcCV4kUF7ltmI6PsrLl/BgKEyS4mqsGChFN0w==
+
 nanomatch@^1.2.9:
   version "1.2.13"
   resolved "https://registry.yarnpkg.com/nanomatch/-/nanomatch-1.2.13.tgz#b87a8aa4fc0de8fe6be88895b38983ff265bd119"
@@ -3895,6 +3900,11 @@ performance-now@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/performance-now/-/performance-now-2.1.0.tgz#6309f4e0e5fa913ec1c69307ae364b4b377c9e7b"
 
+picocolors@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/picocolors/-/picocolors-1.1.1.tgz#3d321af3eab939b083c8f929a1d12cda81c26b6b"
+  integrity sha512-xceH2snhtb5M9liqDsmEw56le376mTZkEX/jEb/RxNFyegNul7eNslCXP9FDj/Lcu0X8KEyMceP2ntpaHrDEVA==
+
 pify@^2.0.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/pify/-/pify-2.3.0.tgz#ed141a6ac043a849ea588498e7dca8b15330e90c"
@@ -3966,14 +3976,23 @@ postcss-values-parser@^1.5.0:
     indexes-of "^1.0.1"
     uniq "^1.0.1"
 
-postcss@^6.0.22, postcss@^6.0.6:
+postcss@^6.0.6:
   version "6.0.23"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.23.tgz#61c82cc328ac60e677645f979054eb98bc0e3324"
   dependencies:
     chalk "^2.4.1"
     source-map "^0.6.1"
     supports-color "^5.4.0"
 
+postcss@^8.0.0:
+  version "8.4.49"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.49.tgz#4ea479048ab059ab3ae61d082190fabfd994fe19"
+  integrity sha512-OCVPnIObs4N29kxTjzLfUryOkvZEq+pf8jTF0lg8E7uETuWHA+v7j3c/xJmiqpX450191LlmZfUKkXxkTry7nA==
+  dependencies:
+    nanoid "^3.3.7"
+    picocolors "^1.1.1"
+    source-map-js "^1.2.1"
+
 pre-commit@^1.2.2:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/pre-commit/-/pre-commit-1.2.2.tgz#dbcee0ee9de7235e57f79c56d7ce94641a69eec6"
@@ -4517,6 +4536,11 @@ sntp@0.2.x:
   dependencies:
     hoek "0.9.x"
 
+source-map-js@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-1.2.1.tgz#1ce5650fddd87abc099eda37dcff024c2667ae46"
+  integrity sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA==
+
 source-map-resolve@^0.5.0:
   version "0.5.2"
   resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.5.2.tgz#72e2cc34095543e43b2c62b2c4c10d4a9054f259"