Release Version 2.1.0

1.Added Timed event tracking support to Extension.Now Extension Sessions can also be tracked.
2.For Timed event you need to start the event with startTimedEvent method and end the event with the timestamp returned during the startTimedEvent method.
3.Manuall screen tracking start screen tracking with trackViewEnterWithScreenName method and end the screen tracking with trackViewExitWithTimestamp method.
4.Now Developer can set a custom ID for the feedback,But you won't be able to communicate with the user unless it is an email address.
5.Removed deprecated API for NSKeyedArchiver & NSKeyedUnarchiver.
6.Debug view now data will be sent to the server for every 10 seconds,if the build configuration is in debug mode.
7. Enhancement in In-App update framework.
8. SDK Support for Vision Pro.