Merge pull request #252 from xwp/renovate/postcss-8.x

Update dependency postcss to v8.1.2

Author: derekherman

package-lock.json

@@ -79,7 +79,7 @@
     "npm-run-all": "4.1.5",
     "null-loader": "4.0.1",
     "optimize-css-assets-webpack-plugin": "5.0.4",
-    "postcss": "8.1.1",
+    "postcss": "8.1.2",
     "postcss-color-function": "4.1.0",
     "postcss-import": "12.0.1",
     "postcss-loader": "4.0.4",