fix(package): update eslint-plugin-vue to version 5.1.0

Closes #18

Author: greenkeeper[bot]

package.json

@@ -24,7 +24,7 @@
     "eslint-plugin-node": "^7.0.1",
     "eslint-plugin-promise": "^4.0.0",
     "eslint-plugin-standard": "^4.0.0",
-    "eslint-plugin-vue": "^4.3.0"
+    "eslint-plugin-vue": "^5.1.0"
   },
   "devDependencies": {
     "eslint": "^5.5.0",