fix: revert registerHandler to void return and add createHandler

fixes the method signature being incorrect and breaking backward compatability

Mod API 1.0 Release

improvement: Change to using functional interfaces for clientbound pa…

…cket handling (#29)

Update README.md

improvement: Add methods to expose clientbound and serverbound identi…

…fiers

Update README version

Fix incorrect packet handling

Release 0.3.1

Add handle methods to clientbound packets (#9)

Release 0.2.1

Release 0.2.1