Bump mini-css-extract-plugin from 2.5.3 to 2.6.0

Bumps [mini-css-extract-plugin](https://github.com/webpack-contrib/mini-css-extract-plugin) from 2.5.3 to 2.6.0.
- [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@v2.5.3...v2.6.0)

---
updated-dependencies:
- dependency-name: mini-css-extract-plugin
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -17,7 +17,7 @@
 		"clean-webpack-plugin": "^4.0.0",
 		"css-loader": "^6.7.0",
 		"json-loader": "0.5.7",
-		"mini-css-extract-plugin": "^2.5.3",
+		"mini-css-extract-plugin": "^2.6.0",
 		"postcss": "^8.4.7",
 		"postcss-loader": "^6.2.1",
 		"postcss-nested": "^5.0.6",