Update style-loader requirement from ^0.18.2 to ^0.23.0 in /{{cookiecutter.app_name}}

Updates the requirements on [style-loader](https://github.com/webpack-contrib/style-loader) to permit the latest version.
- [Release notes](https://github.com/webpack-contrib/style-loader/releases)
- [Changelog](https://github.com/webpack-contrib/style-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/style-loader/commits/v0.23.0)

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

{{cookiecutter.app_name}}/package.json

@@ -42,7 +42,7 @@
     "less-loader": "^4.0.4",
     "manifest-revision-webpack-plugin": "^0.4.0",
     "raw-loader": "^0.5.1",
-    "style-loader": "^0.18.2",
+    "style-loader": "^0.23.0",
     "url-loader": "^1.0.1",
     "webpack": "^2.6.1",
     "webpack-dev-server": "^3.1.5"