composer 打不开 packagist.phpcomposer，可以尝试换 laravel 的
composer config -g repo.packagist composer https://packagist.laravel-china.org
or
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
安装 repo 管理器 crm：
composer global require slince/composer-registry-manager
用法：
composer repo:ls composer repo:use aliyun