AxKills

- Fixed some typos in the config
- Code cleanup
- Small change to the config auto updater

- Now its possible to replace air text (when you kill someone with an empty hand) with anything else (if you want to change any other item's name then it's probably better to use the interactivechat hook)

Fixed the plugin on 1.16-1.18.

- Now when InteractiveChat is not installed, the %item% placeholder just displays the item's name
- Fixed config auto updater