Bump @intlify/core-base and vue-i18n in /frontend

Bumps [@intlify/core-base](https://github.com/intlify/vue-i18n/tree/HEAD/packages/core) to 9.14.2 and updates ancestor dependency [vue-i18n](https://github.com/intlify/vue-i18n/tree/HEAD/packages/vue-i18n). These dependencies need to be updated together.


Updates `@intlify/core-base` from 9.9.1 to 9.14.2
- [Release notes](https://github.com/intlify/vue-i18n/releases)
- [Changelog](https://github.com/intlify/vue-i18n/blob/master/CHANGELOG.md)
- [Commits](https://github.com/intlify/vue-i18n/commits/v9.14.2/packages/core)

Updates `vue-i18n` from 9.9.1 to 9.14.2
- [Release notes](https://github.com/intlify/vue-i18n/releases)
- [Changelog](https://github.com/intlify/vue-i18n/blob/master/CHANGELOG.md)
- [Commits](https://github.com/intlify/vue-i18n/commits/v9.14.2/packages/vue-i18n)

---
updated-dependencies:
- dependency-name: "@intlify/core-base"
  dependency-type: indirect
- dependency-name: vue-i18n
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

frontend/package.json

@@ -41,7 +41,7 @@
     "ol": "^8.2.0",
     "swissgrid": "^1.0.5",
     "vue": "^3.2.31",
-    "vue-i18n": "^9.9.1",
+    "vue-i18n": "^9.14.2",
     "vue-router": "^4.2.5",
     "vuex": "^4.1.0"
   },