Bump style-loader from 0.23.1 to 2.0.0

Bumps [style-loader](https://github.com/webpack-contrib/style-loader) from 0.23.1 to 2.0.0.
- [Release notes](https://github.com/webpack-contrib/style-loader/releases)
- [Changelog](https://github.com/webpack-contrib/style-loader/blob/master/CHANGELOG.md)
- [Commits](webpack/style-loader@v0.23.1...v2.0.0)

---
updated-dependencies:
- dependency-name: style-loader
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package-lock.json

@@ -40,7 +40,7 @@
     "pug": "3.0.1",
     "sass-loader": "6.0.7",
     "showdown": "^2.1.0",
-    "style-loader": "0.23.1",
+    "style-loader": "2.0.0",
     "uglify-js": "3.14.1",
     "uikit": "3.0.0-rc.26",
     "underscore": "1.13.6",