npm: bump @nextcloud/webpack-vue-config from 5.3.0 to 5.4.0

Bumps [@nextcloud/webpack-vue-config](https://github.com/nextcloud/webpack-vue-config) from 5.3.0 to 5.4.0.
- [Release notes](https://github.com/nextcloud/webpack-vue-config/releases)
- [Changelog](https://github.com/nextcloud/webpack-vue-config/blob/master/CHANGELOG.md)
- [Commits](nextcloud-libraries/webpack-vue-config@v5.3.0...v5.4.0)

---
updated-dependencies:
- dependency-name: "@nextcloud/webpack-vue-config"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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