PmChair 2.1.0

- Sitting on a chair no longer broadcasts player coordinates to everyone on the server
- Made it possible to modify /chair on|off command output (messages.yml reset)
- Disabling chairs now keeps them disabled until next restart even if you rejoin
- Other small fixes and improvements

Now checking if the stairs are too much above or below the player + some performance improvements

Check if the stairs are upside down or under something

Uploaded the latest version

Added /chair <on|off> to enable/disable chairs per player

Updated to work with latest NukkitX

Updated to work with latest NukkitX