Yes you have heard correct!

TibiaData is present on GitHub now and we have started with our rewrite of Golang (v3) to be open-source and publicly available.

So why not check out the code for TibiaData v3 that is currently in beta?
In this case, head over here: https://github.com/TibiaData/tibiadata-api-go

As right now, the v3 is still in beta and we are developing on it. So why not help out and contribute to the project?
All contributions are welcome!

Kind regards,
Tobias