Bump @vue/cli-service from 4.5.4 to 4.5.15

Bumps [@vue/cli-service](https://github.com/vuejs/vue-cli/tree/HEAD/packages/@vue/cli-service) from 4.5.4 to 4.5.15.
- [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/v4.5.15/packages/@vue/cli-service)

---
updated-dependencies:
- dependency-name: "@vue/cli-service"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package.json

@@ -14,7 +14,7 @@
   "devDependencies": {
     "@vue/cli-plugin-babel": "^4.5.13",
     "@vue/cli-plugin-eslint": "^4.5.4",
-    "@vue/cli-service": "^4.5.4",
+    "@vue/cli-service": "^4.5.15",
     "babel-eslint": "^10.1.0",
     "eslint": "^6.7.2",
     "eslint-plugin-vue": "^7.15.1",