Latest release broken with macCatalyst

[vincentjames501]

Issue

It looks like #693 broke compilation for us on Catalyst. It blows up with OIDExternalUserAgentIOS is not available in macCatalyst.

The problem is TARGET_OS_IOS is set for Catalyst now per: https://stackoverflow.com/questions/12132933/preprocessor-macro-for-os-x-targets/49560690#49560690

Looks like simply flipping the if/elif order should fix things.

Environment

• Platform that you're experiencing the issue on: iOS (macCatalyst)
• Are you using Expo? No