Background notifications on iOS 13

Fix for background notifications on iOS 13. Upstream merge from vippsas/gozure#1

Support for installations, batch send and unregistering a device

v0.1.3

Added missing functionality thanks to NathanBaulch

• Pass the current context to the http request instead of using the background context, thanks to NathanBaulch #8
• Add support for installations, thanks to NathanBaulch #10
• Add support for batch send, thanks to NathanBaulch #11
• Add support for unregistering a device, thanks to NathanBaulch #5
• Add automatic testing for Go 1.13
• Minor bug fixes #12 #6 #9

Fix for reading the message id

v0.1.2

Headers are lowercase

Minor bugfix

Added an extra check to avoid nil references when parsing unexpected registration results

v0.1.0

• Support for templated notifications
• Support for notification telemetry in higher tiers

v0.0.2

v0.0.2 (#1)

* Refactor, added getRegistrations

* Broke out time generator and http client

* Break out of tests

* You can not schedule a message in the past

* Testing registration

* Redid the parsing of xml

* get registration

* Refactor lib

* Travis

* Support tag expressions

* broken vet script give false negatives

* Removed unused dependencies

* Updates after PR feedback