Bump css-loader from 3.6.0 to 5.0.0

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 3.6.0 to 5.0.0.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](webpack/css-loader@v3.6.0...v5.0.0)

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

Author: dependabot[bot]

package.json

@@ -73,7 +73,7 @@
     "clean-css-cli": "^4.3.0",
     "commander": "^6.1.0",
     "cross-env": "^7.0.2",
-    "css-loader": "^3.2.0",
+    "css-loader": "^5.0.0",
     "es3ify-loader": "^0.2.0",
     "eslint": "^7.11.0",
     "eslint-plugin-import": "^2.22.1",