AppAuth 2.1.0

Summary:
This release removes fallbacks to the external browser whenever ASWebAuthenticationSession isn't able to start. This could be caused by Guided Access mode - which will now fail with an error rather than crashing. In addition, the release adds a new SwiftUI + SPM sample app to make testing changes easier in a modern dev environment.

Changelog:

• Add SwiftUI + Swift Package Manager sample app under Examples/Example-iOS_Swift-SPM. (#952)
• Removed external browser (Safari) fallback from OIDExternalUserAgentIOS. If ASWebAuthenticationSession fails to start (e.g., Guided Access is enabled), the authorization flow now fails with an error instead of opening an external browser. (#954)
• Added resumeExternalUserAgentFlowWithURL:error: to OIDExternalUserAgentSession protocol, returning errors via an out-parameter instead of throwing NSException. The previous method is deprecated and forwards to the new one. (#955)
• Added OIDErrorCodeURLMismatch and OIDErrorCodeInvalidAuthorizationFlow error codes. (#955)

AppAuth 2.0.0

• Raise minimum supported iOS version to iOS 12. (#918)
• Remove deprecated [UIApplication openURL:] method to compile with Xcode 16. (#911)

AppAuth 1.7.6

• Fix OIDExternalUserAgentIOSCustomBrowser on versions iOS 10+ (#871)
• Update runners in tests.yml to macos-13. (#886)

AppAuth 1.7.5

• Use correct xcconfig syntax for podspec (#851)

AppAuth 1.7.4

• Adds defines module to AppAuth.podspec (#845)

AppAuth 1.7.3

• Fix missing manifest in bundle using SPM (#833)

AppAuth 1.7.2

• Streamline copying of privacy manifest (#830)

AppAuth 1.7.1

• Add back missing method to OIDAuthorizationResponse (#825)
• Fix OIDTokenRequest for AppAuthCore and AppAuthTV (#826)

AppAuth 1.7.0

• Introduce addtional http headers to OIDTokenRequest (#770)
• Fix nullability annotation for -[OIDExternalUserAgentIOS init] (#727)
• Feat: allow custom nonce in OIDAuthorizationRequest (#788)
• Introduce addtional http headers to OIDTokenRequest (#770)
• Add privacy manifest (#822)

AppAuth for iOS 1.6.2

• Update framework minimum OS versions to work with Xcode 14.3 (#766)