build: bump css-loader from 0.28.9 to 0.28.10

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 0.28.9 to 0.28.10.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases/tag/v0.28.10)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/css-loader@v0.28.9...v0.28.10)

package.json

@@ -178,7 +178,7 @@
     "chalk": "^2.3.1",
     "compression-webpack-plugin": "^1.1.7",
     "cross-env": "^5.1.4",
-    "css-loader": "0.28.9",
+    "css-loader": "0.28.10",
     "dotenv": "^5.0.0",
     "enzyme": "^3.3.0",
     "enzyme-adapter-react-16": "^1.1.1",