Update dependency @quasar/app to v3

Author: renovate-bot

package.json

@@ -17,7 +17,7 @@
     "quasar": "1.14.5"
   },
   "devDependencies": {
-    "@quasar/app": "1.9.6",
+    "@quasar/app": "3.0.2",
     "@vue/eslint-config-prettier": "6.0.0",
     "babel-eslint": "10.1.0",
     "eslint": "7.13.0",