GameKit watchOS 4.2 to 4.3 API Differences

Added GKGameSession (GKGameSessionEventListenerPrivate)

Added +[GKGameSession postSession:didAddPlayer:]

Added +[GKGameSession postSession:didRemovePlayer:]

Added +[GKGameSession postSession:player:didChangeConnectionState:]

Added +[GKGameSession postSession:player:didSaveData:]

Added +[GKGameSession postSession:didReceiveData:fromPlayer:]

Added +[GKGameSession postSession:didReceiveMessage:withData:fromPlayer:]

Added GKAuthenticationType

Added GKAuthenticatingWithoutUI

Added GKAuthenticatingWithGreenBuddyUI

Added GKAuthenticatingWithAuthKitInvocation