change to 1 block tall + fix rng for ranges of 1

update predicate

fix damage not considering decimals

update predcates to not use inefficient nbt checks

add example + add tag projectile

improve performance by reducing @e selectors

remove attributes, since it can be easely done with macros

update damage to 1.21 (use macros for attributes)

restructure rng to hide pre 1.20.2 way

Merge branch 'main' of https://github.com/mattcarter11/YouKnowWhen-lib

update to 1.21: minecraft, rng, mdd, elister, countdown, olink, const, ykw

use /random

use /random with macro

added new tags

update to 1.20.2 snake_case effects