When set to true, entities will be knocked back when affected by TNT
explosions. Also ignore '__builtin:item' entities to reduce lag, and
replace tabs with spaces in 'mcl_explosions/init.lua'.
Could not find a way to add knockback to entities. After adding a
velocity to them they will just slide around indefinitely. Because of
this, knockback is only enabled on players for now.
Elias Åström