Bump css-loader from 5.2.7 to 6.8.1

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 5.2.7 to 6.8.1.
- [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@v5.2.7...v6.8.1)

---
updated-dependencies:
- dependency-name: css-loader
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -37,7 +37,7 @@
     "@typescript-eslint/parser": "^6.18.0",
     "babel-loader": "^8.2.2",
     "chai": "^4.2.0",
-    "css-loader": "^5.0.1",
+    "css-loader": "^6.8.1",
     "eslint": "^7.16.0",
     "eslint-config-prettier": "^7.1.0",
     "eslint-plugin-no-only-tests": "^3.1.0",