Bump postcss-loader from 8.1.1 to 8.2.0

Bumps [postcss-loader](https://github.com/webpack-contrib/postcss-loader) from 8.1.1 to 8.2.0.
- [Release notes](https://github.com/webpack-contrib/postcss-loader/releases)
- [Changelog](https://github.com/webpack-contrib/postcss-loader/blob/master/CHANGELOG.md)
- [Commits](webpack/postcss-loader@v8.1.1...v8.2.0)

---
updated-dependencies:
- dependency-name: postcss-loader
  dependency-version: 8.2.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -23,7 +23,7 @@
     "css-loader": "7.1.2",
     "mini-css-extract-plugin": "2.9.4",
     "postcss": "8.5.6",
-    "postcss-loader": "8.1.1",
+    "postcss-loader": "8.2.0",
     "postcss-scss": "4.0.9",
     "sass": "1.90.0",
     "sass-loader": "16.0.5",