build(deps): bump vue from 2.6.10 to 3.0.0 in /litemall-admin

Bumps [vue](https://github.com/vuejs/core) from 2.6.10 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] <[email protected]>

litemall-admin/package.json

@@ -59,7 +59,7 @@
     "screenfull": "4.2.0",
     "script-loader": "0.7.2",
     "v-charts": "1.19.0",
-    "vue": "2.6.10",
+    "vue": "3.0.0",
     "vue-count-to": "1.0.13",
     "vue-i18n": "^8.28.2",
     "vue-router": "3.0.2",