* feat: support Zone-Based Firewalls
* chore: add usage example of zone-based firewall
* chore: add note to readme to support unifi controller v2
* fix: invalid path for reordering firewall zone policies
feat: allow creating own http.RoundTripper for http.Client with `HttpRoundTripperProvider` when customizing pre-configured http.Transport with `HttpTransportCustomizer` is not sufficient