New update adding "Skinwalker's little brother" Chupacabra. Made for commissioner

Added:

• Chupacabra. Have 1000 HP, 6 attack damage. Applies Nausea and Blindness on attack. Very fast. Can step on 5 blocks high. Can break blocks and attack Cows, Sheeps, Chickens, Pigs and Villagers. Breaks Boats and Minecarts. Immune to Fire. Slowly regenerates
• Chupacabra Flesh. Applies Hunger
• Chupacabra Bone. Can be crafted into 4 Bone Meals
• /gamerule doChupacabraBreaksBlocks - new game rule that allows to disable Chupacabra breaking blocks
• Chewpacabra - Easter Egg skin for Chewpacabra made as reference to Chewbacca and mistake in Chewpacabra's name that my commissioner made. Unlocks by renaming Chupacabra to "Chewpacabra", "Chewpaccabra", "Чубакабра" or "Чубаккабра"

Changed:

• Skinwalker now swim faster, breaks Boats and Minecarts
• /gamerule mobGriefing now disables Skinwalker and Chupacabra block breaking