Git tag newer releases

[emanuelb]

Currently the only tag in repo is 1.9.20 which is for old nunchuk android app
https://github.com/nunchuk-io/nunchuk-android-nativesdk/tags

the repo contain code for updated versions of the library that is used in newer nunchuk versions, there need to be a easy way to know which commit is used to build the library that is bundled in nunchuk app, this can be achieved by tagging releases in this repo or otherwise by publishing this information elsewhere (like in build scripts of the app meant for RB testing)