2.8.8 Release

• This release fixes an issue (#410) where users that add buttons/functionality to a notification by directly using UNNotificationCategory instead of using our API would cause a crash

• Fixes a thread synchronization issue that would have deadlocked the main thread in very rare situations on initialization (#409)

• Fixes an issue where improperly formatted button JSON (from the create notification API) would cause the SDK to insert nil objects into an NSDictionary instance, causing an EXC_BAD_ACCESS (#409)

• Adds an additional dynamic framework/cocoapod for developers who previously encountered 'transitive dependency' errors using our SDK indirectly as a dependency of another cocoapod in Swift projects