Add missing send method in APNClient
Add missing send method in APNClient

This method is used by the old API and it seems that sometime ago was removed while it was still used.
See usage here: https://github.com/airnotifier/airnotifier/blob/1.x/api/__init__.py#L338
imolainformatica/airnotifier,imolainformatica/airnotifier,imolainformatica/airnotifier