Update polyserve requirement
Update polyserve requirement

Updates the requirements on [polyserve](https://github.com/Polymer/tools) to permit the latest version.
- [Release notes](https://github.com/Polymer/tools/releases)
- [Commits](https://github.com/Polymer/tools/commits/polyserve@0.27.13)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
nextcloud/server,andreas-p/nextcloud-server,nextcloud/server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,nextcloud/server,nextcloud/server