[changed] Consolidated backend and UI SDKs under FirebaseInAppMessaging. Developers should now use pod Firebase/InAppMessaging in their Podfile.
[changed] FIRIAMDefaultDisplayImpl is no longer public.
[changed] FirebaseInAppMessagingDisplay is now deprecated and should be removed from developers' Podfiles.
[changed] Minimum iOS version is now 9.0.
2019-12-17 -- v0.15.6
[fixed] Issues with nullability in card message (#4435).
[fixed] Unit test failure with OCMock 3.5.0 (#4420).
[fixed] Crash in test on device error flow (#4446).
2019-10-08 -- v0.15.5
[added] Added support for UIScene based application lifecycle (#3927).
2019-09-03 -- v0.15.4
[fixed] Undeprecated initializer for FIRInAppMessagingAction so it can be used going forward in custom UI display (#3545).
2019-07-23 -- v0.15.2
[fixed] Fixed issue with messages to be triggered on app launch (#3237).
2019-06-04 -- v0.15.0
[added] Added support for card in-app messages (#2947).
[added] Added direct triggering (via FIAM SDK) of in-app messages (#3081).
2019-05-21 -- v0.14.1
[fixed] Fixed an issue with messages not showing up from custom analytics event trigger (#2981).
[fixed] Fixed crash from sending analytics events with no instance ID (#2988).
2019-03-05 -- v0.13.0
[added] Added a feature allowing developers to programmatically register a delegate for updates on in-app engagement (impression, click, display errors).
2018-09-25 -- v0.12.0
[changed] Separated UI functionality into a new open source SDK called FirebaseInAppMessagingDisplay.
[fixed] Respect fetch between wait time returned from API responses.