NWorldPermissions 4.0.4_Pre1

This version may be unstable.

Change Log

• 改用 GITHUB 检查更新；
• Check the update on 'github.com' instead of on 'spigotmc.org';
• 改用 Kotlin —— 这会使插件更加安全，但也会导致体积变大，下个版本可能尽量压缩体积；
• Use kotlin instead -- which will make the plugin safer but the volume bigger, and I will try to compress it in the next version.