chore(package): update style-loader to version 0.19.0 (#247)

Author: greenkeeper[bot]

package.json

@@ -85,7 +85,7 @@
     "sass-loader": "^6.0.6",
     "sinon": "^4.0.0",
     "sinon-chai": "^2.14.0",
-    "style-loader": "^0.18.2",
+    "style-loader": "^0.19.0",
     "uglify-js": "^3.1.3",
     "uppercamelcase": "^3.0.0",
     "vue": "^2.4.4",