Bump mini-css-extract-plugin from 0.5.0 to 0.9.0

Bumps [mini-css-extract-plugin](https://github.com/webpack-contrib/mini-css-extract-plugin) from 0.5.0 to 0.9.0.
- [Release notes](https://github.com/webpack-contrib/mini-css-extract-plugin/releases)
- [Changelog](https://github.com/webpack-contrib/mini-css-extract-plugin/blob/master/CHANGELOG.md)
- [Commits](webpack/mini-css-extract-plugin@v0.5.0...v0.9.0)

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

Author: dependabot-preview[bot]

package.json

@@ -60,7 +60,7 @@
     "html-webpack-plugin": "3.2.0",
     "jest": "26.0.1",
     "jest-cli": "24.5.0",
-    "mini-css-extract-plugin": "0.5.0",
+    "mini-css-extract-plugin": "0.9.0",
     "node-sass": "4.14.0",
     "optimize-css-assets-webpack-plugin": "5.0.1",
     "sass-loader": "7.3.1",