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.
顺，不妄喜；逆，不惶馁；安，不奢逸；危，不惊惧。--史记