Adding unified receipt to the Apple S2S notification

[mlesar]

Apple added a new property unified_receipt to their S2S notification that should be used instead of existing properties:
https://developer.apple.com/news/?id=11222019a
https://developer.apple.com/documentation/appstoreservernotifications/unified_receipt

Also, added some missing properties to InApp and new DID_RECOVER notification type that should be used instead of RENEWAL.

[codecov]

Codecov Report

Merging #101 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #101   +/-   ##
=======================================
  Coverage   90.36%   90.36%           
=======================================
  Files           4        4           
  Lines         249      249           
=======================================
  Hits          225      225           
  Misses         16       16           
  Partials        8        8

Impacted Files	Coverage Δ
appstore/model.go	100% <ø> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3d3bd2b...1bd9924. Read the comment docs.

[jun06t]

Thanks for your PR :-)

The document says that unified_receipt has this receipt(not S2S notification's receipt).

So you should use InApp struct instead of NotificationReceipt.

[mlesar]

Ah, thank you!
This is fixed now.

[leearmstrong]

LGTM - Would be nice to get this added to a release ASAP

[jun06t]

Thanks a lot :-)

[leearmstrong]

Amazing thanks!

Can we get a release published and tagged for module usage?

[jun06t]

@leearmstrong
I'm sorry for late reply.
I've just released :-)

[leearmstrong]

Amazing, thank you