Bump css-loader from 3.4.2 to 5.2.7

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 3.4.2 to 5.2.7.
- [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@v3.4.2...v5.2.7)

---
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-lock.json

@@ -50,7 +50,7 @@
     "@babel/plugin-syntax-dynamic-import": "^7.8.3",
     "@babel/preset-env": "^7.14.8",
     "babel-loader": "^8.2.2",
-    "css-loader": "^3.4.2",
+    "css-loader": "^5.2.7",
     "file-loader": "^5.1.0",
     "url-loader": "^3.0.0",
     "vue-loader": "^15.9.7",