chore(pacage.json): update devDependencies

Author: sunss

package.json

@@ -96,6 +96,7 @@
     "less-loader": "^10.0.1",
     "lint-staged": "^11.1.2",
     "mini-css-extract-plugin": "^2.2.0",
+    "postcss": "^8.3.6",
     "postcss-loader": "^6.1.1",
     "postcss-nested": "^5.0.6",
     "prettier": "^2.3.2",

yarn.lock

@@ -7083,7 +7083,7 @@ postcss@^7.0.14, postcss@^7.0.17, postcss@^7.0.2, postcss@^7.0.21, postcss@^7.0.
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
-postcss@^8.2.15:
+postcss@^8.2.15, postcss@^8.3.6:
   version "8.3.6"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.3.6.tgz#2730dd76a97969f37f53b9a6096197be311cc4ea"
   integrity sha512-wG1cc/JhRgdqB6WHEuyLTedf3KIRuD0hG6ldkFEZNCjRxiC+3i6kkWUUbiJQayP28iwG35cEmAbe98585BYV0A==