some extends for homestead
- 配置Composer使用**镜像 change composer registry to https://packagist.phpcomposer.com
- 配置npm使用淘宝镜像 change npm registry to https://registry.npm.taobao.org
- 安装xdebug install xdebug for Multiple PHP Versions (5.6, 7.0, 7.1, 7.2) , both cli and fpm mode