* feat: add support for UPNP and Geo IP filtering to USG settings resource
* feat: support complete USG settings resource
* fix messages in required_together_if.go
* improve docs of USG resource
* tests: require version at least 9.0 for unbind_wan_monitors
* feat: require version at least 8.5 for dns_verification
* fix: use go-unifi 1.5.2 to fix NTP
* require 7.0 or later for timeout preference
* require 7.0 or later for geo IP filtering
