報錯信息：[Composer\Downloader\TransportException]
The "https://repo.packagist.org/p/doctrine/inflector.json" file could not be downloaded: fa
iled to open stream: HTTP request failed!
百度了好多，都沒用，有的說是把鏡像改成
composer config -g repo.packagist composer https://packagist.phpcomposer.com，我試了以后是沒用的，后來把鏡像換成阿里雲的鏡像就可以， 可能是因為鏡像地址不穩定吧
改為：composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
即可
