Update to 1.21
Fixed can't create config file
After testing, all versions of 1.21 are supported.
添加了一种处理Mojang验证服务器无法连接的验证方式，这将需要玩家/服务器方使用命令手动绑定UUID
Added a way to handle authentication when the Mojang authentication server cannot connect, this will use manual binding of the UUID