MultiCoreLib

changes since last release:

- updated to 1.17.1

- changed maven namespace

- updated RegistrationTool

RegistrationTool:

- buildEntityV2(String name, EntityType.EntityFactory<T> entity, float width, float height, MobCategory classification, int trackingRange, int updateinterval, DeferredRegister<EntityType<?>> ENTITIES_): a better version of the build entity function. it takes in a string for the id instead of using the classname you could provide eariler