我在composer.json文件里添加了两行依赖
"ignited/laravel-omnipay": "2.*",
"lokielse/omnipay-alipay": "dev-master"
在cmd控制台运行composer update 时报错 如下：
Content-Length mismatch
http://packagist.org could not be fully loaded, package information was loaded from the local cache and may be out of date