#### 问题描述
命令:composer create-project workerman/webman执行后,会提示:

#### 程序代码
```
composer create-project workerman/webman
```
#### 报错信息
```
- Root composer.json requires workerman/webman-framework ^2.1, found workerman/webman-framework[dev-master, v1.0.0, ..., 1.6.x-dev] but it does not match the constraint.
```
#### 截图报错信息里报错文件相关代码
composer.json:

#### 操作系统及workerman/webman等框架组件具体版本
这里写具体的系统环境相关信息
ubuntu_18_04 php8.1