chore(deps-dev): bump mini-css-extract-plugin from 1.4.1 to 1.6.0

Bumps [mini-css-extract-plugin](https://github.com/webpack-contrib/mini-css-extract-plugin) from 1.4.1 to 1.6.0.
- [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@v1.4.1...v1.6.0)

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

Author: dependabot-preview[bot]

yarn.lock

@@ -4063,9 +4063,9 @@ mimic-fn@^2.1.0:
   integrity sha512-OqbOk5oEQeAZ8WXWydlu9HJjz9WVdEIvamMCcXmuqUYjTknH/sqsWvhQ3vgwKFRR1HpjvNBKQ37nbJgYzGqGcg==
 
 mini-css-extract-plugin@^1.3.4:
-  version "1.4.1"
-  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-1.4.1.tgz#975e27c1d0bd8e052972415f47c79cea5ed37548"
-  integrity sha512-COAGbpAsU0ioFzj+/RRfO5Qv177L1Z/XAx2EmCF33b8GDDqKygMffBTws2lit8iaPdrbKEY5P+zsseBUCREZWQ==
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-1.6.0.tgz#b4db2525af2624899ed64a23b0016e0036411893"
+  integrity sha512-nPFKI7NSy6uONUo9yn2hIfb9vyYvkFu95qki0e21DQ9uaqNKDP15DGpK0KnV6wDroWxPHtExrdEwx/yDQ8nVRw==
   dependencies:
     loader-utils "^2.0.0"
     schema-utils "^3.0.0"