This update will be required for the next release of TrainCarts, since many new APIs that TC will need for soon-to-be-announced features are added in this update.

Changes for 1.12.2-v2:

• Changes in Mountiplex to significantly speed up function calls performed on *Handles, particularly when parameters or return types are primitives. There will also be less temporary lag when instances are first created.
• Cleanup of old deprecated code, moving more of it to the new Handle based implementations instead of the old reflection system
• Fixes setBlockDataFast not cancelling physics correctly when used
• Fixes BlockUtil doPhysics 'self' parameter not working
• Fixes BlockData getStepSound() not working correctly
• Change all matrix maths to use doubles instead of floats, since it will also be used outside of maps. This also has some effect on map rendering.
• Add handle classes for the PlayerInfo packet
• Add handle classes for GameProfile Property system
• Several performance tweaks made after profiling

Changes for 1.12.2-v3:

• Fix Minecart forwardMovement field for >= 1.12
• Fixes sound API to work on all minecraft versions
• Fixes to onSyncPassengers (network controller)
• Fixes compatibility issues introduced with 1.12.2-v2