chore(package): update eslint-plugin-vue to version 6.1.1

Closes #83

Author: greenkeeper[bot]

Diff for: package.json

@@ -67,7 +67,7 @@
     "eslint-friendly-formatter": "^4.0.1",
     "eslint-loader": "^2.0.0",
     "eslint-plugin-html": "^4.0.6",
-    "eslint-plugin-vue": "^5.0.0",
+    "eslint-plugin-vue": "^6.1.1",
     "extract-text-webpack-plugin": "^3.0.0",
     "file-loader": "^3.0.0",
     "friendly-errors-webpack-plugin": "^1.6.1",