Bump css-minimizer-webpack-plugin from 4.0.0 to 4.2.0

Bumps [css-minimizer-webpack-plugin](https://github.com/webpack-contrib/css-minimizer-webpack-plugin) from 4.0.0 to 4.2.0.
- [Release notes](https://github.com/webpack-contrib/css-minimizer-webpack-plugin/releases)
- [Changelog](https://github.com/webpack-contrib/css-minimizer-webpack-plugin/blob/master/CHANGELOG.md)
- [Commits](webpack/css-minimizer-webpack-plugin@v4.0.0...v4.2.0)

---
updated-dependencies:
- dependency-name: css-minimizer-webpack-plugin
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -29,7 +29,7 @@
     "chokidar": "3.5.3",
     "concurrently": "7.3.0",
     "css-loader": "6.7.1",
-    "css-minimizer-webpack-plugin": "4.0.0",
+    "css-minimizer-webpack-plugin": "4.2.0",
     "html-minifier": "4.0.0",
     "mini-css-extract-plugin": "2.6.1",
     "postcss": "8.4.16",