Update dependency vue to v3 [SECURITY]

Author: renovate[bot]

package.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "express": "4.16.3",
-    "vue": "2.5.17",
+    "vue": "3.0.0",
     "@vue/cli-service": "4.4.4" 
   },
   "devDependencies": {