chore(package): update style-loader to version 0.20.0

Author: greenkeeper[bot]

package.json

@@ -84,7 +84,7 @@
     "sinon": "^4.1.3",
     "sinon-chai": "^2.14.0",
     "source-map-loader": "^0.2.3",
-    "style-loader": "^0.19.1",
+    "style-loader": "^0.20.0",
     "tman": "^1.7.3",
     "ts-node": "^4.0.0",
     "tslint": "^5.8.0",