Bump css-loader from 3.3.2 to 3.4.0 (#12673)

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 3.3.2 to 3.4.0.
- [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/v3.3.2...v3.4.0)

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

package.json

@@ -84,7 +84,7 @@
     "compression-webpack-plugin": "^3.0.1",
     "copy-webpack-plugin": "^5.1.1",
     "cross-env": "^6.0.3",
-    "css-loader": "^3.3.2",
+    "css-loader": "^3.4.0",
     "cssnano": "^4.1.10",
     "detect-passive-events": "^1.0.2",
     "dotenv": "^8.2.0",