Bump css-loader from 5.2.7 to 7.1.2

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 5.2.7 to 7.1.2.
- [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@v5.2.7...v7.1.2)

---
updated-dependencies:
- dependency-name: css-loader
  dependency-version: 7.1.2
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -49,7 +49,7 @@
     "babel-loader": "^8.2.3",
     "copy-webpack-plugin": "^6.4.1",
     "cross-env": "^7.0.3",
-    "css-loader": "^5.2.7",
+    "css-loader": "^7.1.2",
     "fastestsmallesttextencoderdecoder": "^1.0.22",
     "file-loader": "^6.2.0",
     "html-webpack-plugin": "^4.5.2",