CoreTelephony iOS 12.0 to 12.1 API Differences

CTSubscriber.h
Added CTSubscriberDelegate
Added -[CTSubscriberDelegate subscriberTokenRefreshed:]
Added CTSubscriber.identifier
Added CTSubscriber.delegate
Modified CTSubscriberTokenRefreshed
AvailabilityReplacement
FromAvailablenone
ToDeprecated-[CTSubscriberDelegate subscriberTokenRefreshed:]

CTSubscriberInfo.h
Added +[CTSubscriberInfo subscribers]
Modified +[CTSubscriberInfo subscriber]
AvailabilityReplacement
FromAvailablenone
ToDeprecatedUse subscribers instead