Noble Whitelist

Latest update to version 1.x.x (Maybe one more for fixes) So I can work for the version 2.0.0, now that the 1.21 released.

• Now correctly supports 1.21
• Renamed PlaceholderAPI and MiniPlaceholders indentifiers as previously announced.
  • NWhitelist -> nwhitelist
• Commands: Added a small fallback in case it fails to load.
• Commands: In case of future versions of minecraft and this fails, it will be disabled, the plugin will continue to work but without commands.