build(deps): 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)

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

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

package.json

@@ -13,7 +13,7 @@
         "@fortawesome/free-solid-svg-icons": "^5.15.3",
         "@fortawesome/vue-fontawesome": "^3.0.0-4",
         "core-js": "^3.15.2",
-        "css-loader": "^5.2.7",
+        "css-loader": "^6.0.0",
         "dompurify": "^2.3.0",
         "hotkeys-js": "^3.8.7",
         "mux.js": "^5.12.1",