Response not being handled

[markst]

Only response 410 is being handled by apns.
We need to handle all the errors appropriately.

Ideally return the error status-code & reason to the owner scheduling.

https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/CommunicatingwithAPNs.html#//apple_ref/doc/uid/TP40008194-CH11-SW1

Table 8-4Status codes for an APNs response

Status code	Description
200	Success
400	Bad request
403	There was an error with the certificate or with the provider authentication token
405	The request used a bad :method value. Only POST requests are supported.
410	The device token is no longer active for the topic.
413	The notification payload was too large.
429	The server received too many requests for the same device token.
500	Internal server error
503	The server is shutting down and unavailable.

[markst]

At the very least log out to rails logger with the response if not 200

https://github.com/Papercloud/notify_user/blob/feature/apns-http2/app/models/notify_user/apns.rb#L38