Bugfix v1.0.3 - 1.21

Bugfix for egg trampling. As mentioned in #2, zombie variants always had egg trampling disabled (even if the rule was set to TRUE). This has now been amended.

Additionally, the trampling setting has been modified so that zombies+ will still target eggs even if they cannot destroy them. This is to maintain their vanilla behaviour whilst still adhering to the mob griefing rule.