v0.5

• Add instance label to alert body
• Update go dependencies
• Build with go 1.16
• Fix typos and added docstrings

v0.4

Fix int64 to string conversion

v0.3: Switch to sending data messages only

Handling of notification messages is quite inconsistent (at least on
android). Send the payload in data only and let the app handle the
notification locally.

Add pageTime to data payload (Unix epoch UTC).

v0.2

Add a metric for total FCM messags send

Initial release

v0.1

Update tokens