composer問題解決方案

composer require jaeger/querylist

 [Composer\Downloader\TransportException]
  The "https://packagist.phpcomposer.com/p/provider-2017%241fcb04ee223fce21d167c8a49f09025ba85c917aee976588a99ef82c3a
  a609dc.json" file could not be downloaded (HTTP/1.1 404 Not Found)

composer self-update
Updating to version 1.8.5 (stable channel).
   Downloading (100%)
Failed to decode response: zlib_decode(): data error
Retrying with degraded mode, check https://getcomposer.org/doc/articles/troubleshooting.md#degraded-mode for more info

這是因爲你的網卡開啓了ipv6，關閉ipv6使用ipv4即可。