更改composer为阿里云镜像

阿里云地址

https://developer.aliyun.com/composer

所有项目都会使用该镜像地址：

composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/

取消配置：
composer config -g --unset repos.packagist

项目配置

仅修改当前工程配置，仅当前工程可使用该镜像地址：
composer config repo.packagist composer https://mirrors.aliyun.com/composer/


取消配置：
composer config --unset repos.packagist