Upgrade vue-cli

Author: aLLeXUs

frontend/package.json

@@ -23,9 +23,9 @@
     "vuex": "^3.4.0"
   },
   "devDependencies": {
-    "@vue/cli-plugin-babel": "^3.5.0",
-    "@vue/cli-plugin-eslint": "^3.5.0",
-    "@vue/cli-service": "^3.5.0",
+    "@vue/cli-plugin-babel": "^4.3.1",
+    "@vue/cli-plugin-eslint": "^4.3.1",
+    "@vue/cli-service": "^4.3.1",
     "@vue/eslint-config-airbnb": "^4.0.0",
     "babel-eslint": "^10.0.1",
     "eslint": "^5.8.0",