UIKit iOS 14.0 Beta 2 to Beta 3 API Differences

NSAttributedString.h
Added NSTrackingAttributeName
UIAction.h
Added +[UIAction actionWithHandler:]
UIControl.h
Added -[UIControl menuAttachmentPointForConfiguration:]
UIMenu.h
Added +[UIMenu menuWithChildren:]
UINavigationItem.h
Added UINavigationItemBackButtonDisplayMode
Added UINavigationItemBackButtonDisplayModeDefault
Added UINavigationItemBackButtonDisplayModeGeneric
Added UINavigationItemBackButtonDisplayModeMinimal
Added UINavigationItem.backButtonDisplayMode