Bump css-loader from 5.2.7 to 6.0.0

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 5.2.7 to 6.0.0.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/css-loader/compare/v5.2.7...v6.0.0)

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

package.json

@@ -28,7 +28,7 @@
     "case-sensitive-paths-webpack-plugin": "^2.4.0",
     "copy-webpack-plugin": "^9.0.0",
     "cross-env": "^7.0.3",
-    "css-loader": "^5.2.6",
+    "css-loader": "^6.0.0",
     "eslint": "^7.21.0",
     "eslint-config-airbnb-base": "^14.2.1",
     "eslint-plugin-import": "^2.23.4",