Drop platform versions [SDK-2895]

[Widcket]

Changes

⚠️ THIS PR CONTAINS BREAKING CHANGES

The deployment targets were bumped to:

• iOS 12.0
• macOS 10.15
• Mac Catalyst 13.0
• tvOS 12.0
• watchOS 6.2

Since ASWebAuthenticationSession supports iOS 12+, the WebAuth strategies for the older iOS versions were removed. That means there is no longer a need to keep different Web Auth implementations for macOS and iOS, as both use ASWebAuthenticationSession only now, so the BaseWebAuth subclasses were removed, and BaseWebAuth was renamed to Auth0WebAuth, which is the name it had before the split.

Similarly, SessionTransaction was merged back into BaseAuthTransaction, and BaseAuthTransaction was renamed to BaseTransaction. And the AuthResumable and AuthCancelable protocols were subsumed into AuthTransaction.

Finally, all the conditional compilation blocks that were targeting older platforms (and the new minimums) were removed.

Removed

• Auth0/A0SimpleKeychain+RSAPublicKey.swift
• Auth0/ControllerModalPresenter.swift
• Auth0/SafariSession.swift
• Auth0/SilentSafariViewController.swift
• Auth0/SessionTransaction.swift

Renamed

• Auth0/AuthenticationServicesSession.swift -> Auth0/ASTransaction.swift
• Auth0/AuthenticationServicesSessionCallback.swift -> Auth0/ASCallbackTransaction.swift
• Auth0/SessionCallbackTransaction.swift -> Auth0/BaseCallbackTransaction.swift
• Auth0/BaseAuthTransaction.swift -> Auth0/BaseTransaction.swift
• Auth0/BaseWebAuth.swift -> Auth0/Auth0WebAuth.swift
• Auth0/WebAuthenticatable.swift -> Auth0/WebAuth.swift

Testing

The changes have been tested manually, by performing Web Auth login and logout in test apps, as follows:

Using Cocoapods

• iOS (simulator)
• macOS
• macOS Catalyst

Using Carthage

• iOS (simulator)
• macOS
• macOS Catalyst Carthage does not support building XCFrameworks for macCatalyst

Using SPM

• iOS (simulator)
• macOS
• macOS Catalyst

Checklist

• I have read the Auth0 general contribution guidelines
• All existing and new tests complete without errors
• All active GitHub checks have passed