composer 在thinkphp5下安裝easywechat 報錯
Failed to enable crypto
failed to open stream: operation failed
解決方法，更改 Packagist 為國內鏡像，不知道會不會對后續操作有影響，反正現在是可以了：
composer config -g repo.packagist composer https://packagist.phpcomposer.com
然后再安裝
composer require overtrue/wechat:~4.0 -vvv