Bump vue from 2.7.16 to 3.0.0 in /packages/ui

Bumps [vue](https://github.com/vuejs/core) from 2.7.16 to 3.0.0.
- [Release notes](https://github.com/vuejs/core/releases)
- [Changelog](https://github.com/vuejs/core/blob/v3.0.0/CHANGELOG.md)
- [Commits](https://github.com/vuejs/core/commits/v3.0.0)

---
updated-dependencies:
- dependency-name: vue
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

packages/ui/package.json

@@ -44,7 +44,7 @@
     "fuse.js": "7.0.0",
     "highlight.js": "10.7.3",
     "htmlescape": "1.1.1",
-    "vue": "2.7.16",
+    "vue": "3.0.0",
     "vue-analytics": "5.22.1",
     "vue-meta": "2.4.0",
     "vue-router": "3.6.5",