MessageUI iOS 10.3 to 11.0 API Differences

MFMailComposeViewController.h
Added -[MFMailComposeViewController setPreferredSendingEmailAddress:]
Modified MFMailComposeErrorDomain
Declaration
FromNSString *const _Nonnull MFMailComposeErrorDomain
Toconst NSErrorDomain _Nonnull MFMailComposeErrorDomain