3870 [in_app_purchase] iOS example using in_app_purchase_ios package (cla: yes, p: in_app_purchase, platform-ios)

3874 [in_app_purchase] Expose in_app_purchase_exception.dart correctly (cla: yes, p: in_app_purchase, platform-ios)

3877 [in_app_purchase] Implementation of the app facing package (cla: yes, p: in_app_purchase, platform-ios, platform-android)

3879 [in_app_purchase] Update to pub version of in_app_purchase_platform_interface dependency (cla: yes, waiting for tree to go green, p: in_app_purchase, platform-ios, platform-android)

3883 [in_app_purchase] Configure correct App Bundle identifier (cla: yes, p: in_app_purchase, platform-ios)