Updated made:
- Added a Zombie pet
- Added a Enderman pet
- Added a Spider pet
- Added individual pet configurations
- Changed some configurations (recommended you backup files)
- Added command aliases for /pet
- Added the Permissions ["Pet.spider", "Pet.zombie", and "Pet.enderman"]
- Fixed bug with /pet command

Note: there might be a single bug that will happen to certain pets I am aware of this error but it is not harmful to the server or files I am getting it fixed as we speak.