Merge pull request #3 from scriptex/greenkeeper/postcss-nested-4.0.0

Update postcss-nested to the latest version 🚀

Author: scriptex

package.json

@@ -26,7 +26,7 @@
     "postcss-easy-import": "^3.0.0",
     "postcss-flexbugs-fixes": "^4.0.0",
     "postcss-mixins": "^6.2.0",
-    "postcss-nested": "^3.0.0",
+    "postcss-nested": "^4.0.0",
     "postcss-normalize": "^7.0.0",
     "postcss-preset-env": "^5.2.3",
     "postcss-utilities": "^0.8.0"