Replace postcss-nesting with postcss-nested

package.json

@@ -19,6 +19,6 @@
   },
   "dependencies": {
     "postcss-import": "^12.0.1",
-    "postcss-nesting": "^7.0.0"
+    "postcss-nested": "^4.1.0"
   }
 }

webpack.mix.js

@@ -23,7 +23,7 @@ mix.disableNotifications()
     .options({
         postCss: [
             require('postcss-import')(),
-            require('postcss-nesting')(),
+            require('postcss-nested')(),
         ],
         processCssUrls: false,
     });

yarn.lock

@@ -4592,11 +4592,12 @@ postcss-nested@^3.0.0:
     postcss "^6.0.14"
     postcss-selector-parser "^3.1.1"
 
-postcss-nesting@^7.0.0:
-  version "7.0.0"
-  resolved "https://registry.yarnpkg.com/postcss-nesting/-/postcss-nesting-7.0.0.tgz#6e26a770a0c8fcba33782a6b6f350845e1a448f6"
+postcss-nested@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/postcss-nested/-/postcss-nested-4.1.0.tgz#271da8a047f2ee378139410ae2400b1c67d0bf30"
   dependencies:
     postcss "^7.0.2"
+    postcss-selector-parser "^3.1.1"
 
 postcss-normalize-charset@^1.1.0:
   version "1.1.1"