Extra Hard Mode

ExtraHardMode is almost ready for a 1.13-compatible release!

• Accounts for plugins that improperly fire bukkit events with null parameters
• Zombie skulls won't be placed if there is no air block present for it to be placed (fixes skulls replacing passable/non-solid blocks like ladders)
• Allow Zombie skulls to be broken in claims
• Use 1.13 BlockData for skull rotation
• Attempt to give the respawned ender dragon AI

Also, if you can help confirm a bug, can you test this issue and comment on there if you can reproduce or not? https://github.com/MLG-Fortress/ExtraHardMode/issues/11