chore(deps-dev): bump @vue/cli-service from 4.0.5 to 4.1.2 in /frontend

Bumps [@vue/cli-service](https://github.com/vuejs/vue-cli/tree/HEAD/packages/@vue/cli-service) from 4.0.5 to 4.1.2.
- [Release notes](https://github.com/vuejs/vue-cli/releases)
- [Changelog](https://github.com/vuejs/vue-cli/blob/dev/CHANGELOG.md)
- [Commits](https://github.com/vuejs/vue-cli/commits/v4.1.2/packages/@vue/cli-service)

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

frontend/package.json

@@ -27,7 +27,7 @@
   "devDependencies": {
     "@vue/cli-plugin-babel": "^4.1.2",
     "@vue/cli-plugin-eslint": "^4.1.1",
-    "@vue/cli-service": "^4.0.5",
+    "@vue/cli-service": "^4.1.2",
     "babel-eslint": "^10.0.3",
     "eslint": "^6.7.2",
     "eslint-plugin-vue": "^6.1.2",