The 1.20.6 update for Minestom comes (as usual) with some breaking changes both from the protocol and api improvements for the library. The major changes are as follows:
- Hephaistos removed in favor of Adventure NBT.
- Item components
- Pathfinding
- Dynamic registry improvements
The Inventory Rework PR was previously part of the 1.20.5 branch. It is in the middle of a rework, and is not quite ready for this version. We are still planning to include it in a later version (most likely 1.21.1). If you already updated and have to revert, sorry for the trouble!