Adding a push notification client.
Adding a push notification client.

- Apple does not respond if a PN send is successful
- Apple does respond if it fails
- creates a timeout channel (1 second) to handle this; there is a false-positive potential there
Coccodrillo/apns,dalent/apns,ylong/apns,mentionapp/apns.go,gzw/apns,anachronistic/apns,gsempe/apns,draaglom/apns,princesuke/apns,Wattpad/apns,topfreegames/apns-go,mondough/apns,phuc0302/go-apns,mathcamp/apns,lnparker/apns