Bump css-loader from 1.0.1 to 3.2.0 in /frontend

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 1.0.1 to 3.2.0.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](webpack/css-loader@v1.0.1...v3.2.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

frontend/package-lock.json

@@ -27,7 +27,7 @@
     "chalk": "^2.4.2",
     "compression-webpack-plugin": "^2.0.0",
     "copy-webpack-plugin": "^4.6.0",
-    "css-loader": "^1.0.1",
+    "css-loader": "^3.2.0",
     "eslint": "^5.16.0",
     "eslint-config-airbnb": "^17.1.1",
     "eslint-config-prettier": "^3.3.0",