错误：
[InvalidArgumentException] Could not find package topthink/think with stability stable.
删除之前的镜像：
composer config -g --unset repos.packagist
成功下载tp
composer create-project topthink/think=5.1.* tp5
Tp5.1安装错误 Could not find package topthink/think with stability stable.
人生建议：不要因为嘴硬而失去重要的东西，清醒，知趣，明得失，知进退。