chore(package): update style-loader to version 0.23.0

Closes #22

Author: greenkeeper[bot]

package.json

@@ -67,7 +67,7 @@
     "optimize-css-assets-webpack-plugin": "^3.2.0",
     "react-test-renderer": "^16.2.0",
     "sass-loader": "^6.0.6",
-    "style-loader": "^0.20.0",
+    "style-loader": "^0.23.0",
     "uglifyjs-webpack-plugin": "^1.1.6",
     "url-loader": "^0.6.2",
     "webpack-cli": "^2.0.13",