Bump css-loader from 0.28.6 to 0.28.11

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 0.28.6 to 0.28.11.
- [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@v0.28.6...v0.28.11)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -32,7 +32,7 @@
     "babel-preset-react": "6.24.1",
     "classnames": "2.2.5",
     "copy-webpack-plugin": "4.0.1",
-    "css-loader": "0.28.6",
+    "css-loader": "0.28.11",
     "eslint": "4.19.0",
     "eslint-config-scratch": "5.1.0",
     "eslint-plugin-json": "1.2.0",