chore: Bump css-loader from 3.6.0 to 4.2.1 (#45)

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 3.6.0 to 4.2.1.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/css-loader@v3.6.0...v4.2.1)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -32,7 +32,7 @@
     "@types/rimraf": "^3.0.0",
     "@types/tapable": "^1.0.6",
     "@types/webpack": "^4.41.21",
-    "css-loader": "^3.6.0",
+    "css-loader": "^4.2.1",
     "jest": "^26.1.0",
     "rimraf": "^3.0.2",
     "standard-version": "^8.0.2",