mews/captcha 2.2 可以安装，

mews/captcha 2.2 可以安装，

composer require "mews/captcha:~2.0" 报错
[Composer\Downloader\TransportException]
The "https://packagist.laravel-china.org/p/mews...
9dc2faa8979d.json" file could not be downloaded: php_network_getaddresses: getaddrinfo failed: Temporary failu
re in name resolution
failed to open stream: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution