chore(package): update vue-loader to version 15.8.1

Closes #66

Author: greenkeeper[bot]

package.json

@@ -50,7 +50,7 @@
     "stylelint-config-sass-guidelines": "^6.0.0",
     "stylelint-scss": "^3.9.0",
     "uglifyjs-webpack-plugin": "^2.1.3",
-    "vue-loader": "15.7.1",
+    "vue-loader": "15.8.1",
     "vue-template-compiler": "^2.6.10",
     "webpackbar": "^4.0.0"
   },