1.15.1

A fix and improvement update, here is the changelog:

• fix FIRE protection for arena regions
• add a new module named "projectiles"
• fix edit mode in command completion
• allow /pa leave to quit edit mode
• fix auto-ignition of TNT blocks
• fix region removal
• fix netherite armors
• fix NullPointerException on player death
• add custom potion effect serialization

...and several improvements of documentation