composer配置阿里镜像源，解决composer Updating dependencies (including require-dev)不更新的问题

配置全局生效

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

如果想改回默认，可以取消全局配置

composer config -g --unset repos.packagist

更多关于阿里镜像源信息，请访问阿里云 Composer 全量镜像