Bump postcss-nested from 4.2.2 to 4.2.3

Bumps [postcss-nested](https://github.com/postcss/postcss-nested) from 4.2.2 to 4.2.3.
- [Release notes](https://github.com/postcss/postcss-nested/releases)
- [Changelog](https://github.com/postcss/postcss-nested/blob/master/CHANGELOG.md)
- [Commits](postcss/postcss-nested@4.2.2...4.2.3)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -102,7 +102,7 @@
     "loader.js": "^4.7.0",
     "normalize.css": "^8.0.1",
     "nyc": "^15.1.0",
-    "postcss-nested": "^4.2.2",
+    "postcss-nested": "^4.2.3",
     "prettier": "^2.0.5",
     "qunit-console-grouper": "^0.2.0",
     "qunit-dom": "^1.2.0",