Xamarin-macios: interface NFCIso15693Tag : NFCTag is out of date in iOS 13

[Stuey2]

The implementation of interface NFCIso15693Tag : NFCTag (see current implementation) is out of date. In iOS 13 NFCIso15693Tag inherits from NFCNdefTag, similar to interface NFCIso7816Tag : NFCTag, NFCNdefTag (see iso7816 implementation)

Please could this be updated to reflect the current iOS protocols, see NFCISO15693Tag and NFCISO7816Tag Relationships heading, which show that both inherit from NFCNDEFTag

[chamons]

This may be fixable without an API break:

REQUIRES JUDGMENT: Introducing a new base class

from

https://docs.microsoft.com/en-us/dotnet/core/compatibility/

[spouliot]

NFCIso7816Tag is a protocol (interface) which makes it easier, unless inlined (which I don't think it is)

[spouliot]

It's not an issue to update it.
We'll include this in our xcode12 support since it's _likely_ the next (non frozen) branch to be released.

[spouliot]

fix is in xcode12 branch