Bump mini-css-extract-plugin from 0.8.0 to 0.9.0 (#12674)

Bumps [mini-css-extract-plugin](https://github.com/webpack-contrib/mini-css-extract-plugin) from 0.8.0 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](https://github.com/webpack-contrib/mini-css-extract-plugin/compare/v0.8.0...v0.9.0)

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

package.json

@@ -109,7 +109,7 @@
     "lodash": "^4.17.14",
     "mark-loader": "^0.1.6",
     "marky": "^1.2.1",
-    "mini-css-extract-plugin": "^0.8.0",
+    "mini-css-extract-plugin": "^0.9.0",
     "mkdirp": "^0.5.1",
     "npmlog": "^4.1.2",
     "object-assign": "^4.1.1",

yarn.lock

@@ -6804,10 +6804,10 @@ mimic-fn@^2.0.0, mimic-fn@^2.1.0:
   resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-2.1.0.tgz#7ed2c2ccccaf84d3ffcb7a69b57711fc2083401b"
   integrity sha512-OqbOk5oEQeAZ8WXWydlu9HJjz9WVdEIvamMCcXmuqUYjTknH/sqsWvhQ3vgwKFRR1HpjvNBKQ37nbJgYzGqGcg==
 
-mini-css-extract-plugin@^0.8.0:
-  version "0.8.0"
-  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.8.0.tgz#81d41ec4fe58c713a96ad7c723cdb2d0bd4d70e1"
-  integrity sha512-MNpRGbNA52q6U92i0qbVpQNsgk7LExy41MdAlG84FeytfDOtRIf/mCHdEgG8rpTKOaNKiqUnZdlptF469hxqOw==
+mini-css-extract-plugin@^0.9.0:
+  version "0.9.0"
+  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.9.0.tgz#47f2cf07aa165ab35733b1fc97d4c46c0564339e"
+  integrity sha512-lp3GeY7ygcgAmVIcRPBVhIkf8Us7FZjA+ILpal44qLdSu11wmjKQ3d9k15lfD7pO4esu9eUIAW7qiYIBppv40A==
   dependencies:
     loader-utils "^1.1.0"
     normalize-url "1.9.1"