This update makes the plugin compatible with ONLY Spigot 1.16.1, along with a few other things (see the changelog below).

What to expect in the future:
* Compatibility with all versions 1.13 and up
* Ability to control pets when riding them (may require ProtocolLib)
* More regular updates!

Changelog:
* Made plugin compatible with 1.16
* Added mushroom pet
* Added remove option to rightclick-menu
* Made adjustments to default config
* Made /petsplus open the pet menu when a pet is equipped, otherwise the pet selection menu
* Centered items in pet selection menu
* Improved gui population
* Changed nl.mistermel package to tech.mistermel
* A lot of improvements in code quality & readability