The link to https://github.com/godotengine/godot-google-play-billing/releases is misleading, because the releases there are to old. You have to compile the project yourself, because otherwise google rejects the .aar upload because of using old api. Furthermore the described methods and signals correspond to the new Version and not the released Version 1.0.1
Hope my English will do.
Found via `codespell -q 3 -S ./LICENSE.txt,./tutorials/i18n,./_tools/codespell-ignore-lines.txt -L doubleclick,findn,lod,inout,nd,raison,te` and other means
These doc changes are dependent on the following PR:
https://github.com/godotengine/godot-google-play-billing/pull/25
Summary of changes:
* Update queryPurchases section to reflect API change to be async
* Added details on functions added to v1.1
* Expanded detail on operation and options of the plugin
