Setting eslint to v4 as plugins still require it

package.json

@@ -13,7 +13,7 @@
     "babel-polyfill": "^6.26.0",
     "bootstrap-sass": "^3.3.7",
     "cross-env": "^5.2.0",
-    "eslint": "^5.0.1",
+    "eslint": "^4.19.1",
     "eslint-config-airbnb-base": "^13.0.0",
     "eslint-plugin-import": "^2.13.0",
     "eslint-plugin-vue": "^4.5.0",