Bump css-loader from 3.5.2 to 3.5.3

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 3.5.2 to 3.5.3.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/css-loader@v3.5.2...v3.5.3)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -22,7 +22,7 @@
     "babel-polyfill": "^6.6.1",
     "babel-preset-env": "^1.7.0",
     "clean-webpack-plugin": "^3.0.0",
-    "css-loader": "^3.5.2",
+    "css-loader": "^3.5.3",
     "html-webpack-plugin": "^4.2.0",
     "mini-css-extract-plugin": "^0.9.0",
     "node-sass": "^4.13.1",