Creeper explosions drop all items

!The creeper drops all the blocks it explodes

This is a very simple (one mixin copying a built in method and changing one line) mod, creepers will drop all blocks they explode.

This is done by changing a creepers explosion type to be TNT instead of Creeper, this doesn't appear to noticeable in game, as a creeper death still says it was the creeper that caused it.