chore(deps-dev): bump css-loader from 3.6.0 to 4.3.0 (#16)

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 3.6.0 to 4.3.0.
- [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@v3.6.0...v4.3.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -37,7 +37,7 @@
     "babel-plugin-module-resolver": "^4.0.0",
     "babel-polyfill": "^6.26.0",
     "conventional-changelog-cli": "^2.1.0",
-    "css-loader": "^3.4.2",
+    "css-loader": "^4.3.0",
     "enzyme": "^3.11.0",
     "enzyme-adapter-react-16": "^1.15.4",
     "eslint": "^7.0.0",