Final build officially created for Minecraft 1.15.2.
While the API was mostly reaching stability, we came across an important behavioral bug that required us in good conscience to upgrade to Minecraft 1.16.4 directly.
Notably, this build will "work" for all intents and purposes to run tests, but the overall game breaking behavior is that if multiple Overworlds exist, and structures generate, a race condition will lead to a hard crash trying to generate a Stronghold structure.
That being said, this build is being made available for archival reasons, along with the git tag for others who may wish to continue on an old version of Minecraft ill supported for the data-driven changes that the API has made with the 1.16.4 update.