Battle Music

• Ported to 1.21

[ Changelog from 1.20.1 ]

• Refactored most of the mod's code, should be more performant
• Fixed default configuration values
• Added a new debug command for checking what's currently playing
• Fixed music breaking when switching dimensions while a song is playing
• Fixed Ender Dragon music shifting in pitch before all crystals were destroyed (again)
• Added phase 2 pitch shifting for the Wither and unified phase 2 pitch shifting under one configuration setting
• Made battle music only start if you and the mob can see each other