chore: bump css-loader from 3.6.0 to 6.11.0

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 3.6.0 to 6.11.0.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/css-loader@v3.6.0...v6.11.0)

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

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

Author: dependabot[bot]

package.json

@@ -59,7 +59,7 @@
     "babel-loader": "^8.0.0",
     "babel-preset-env": "2.0.0-beta.2",
     "concurrently": "^5.0.0",
-    "css-loader": "^3.0.0",
+    "css-loader": "^6.11.0",
     "extract-text-webpack-plugin": "^3.0.0",
     "node-sass": "^9.0.0",
     "nodemon": "^2.0.0",