Deals & Lighstreamer fixes

• The API.Activity and Streamer.Deal.Update payloads have been modified to be similar to API.Position, API.WorkingOrder, and API.Confirmation.
• Bundeling Lighstreamer binaries in an .xcframework produced some incompatibilities on the underlying ObjC calls. Those have now been fixed and all Streamer subscriptions should work now.
• Deal limits and stops now have better behavior.