composer self-update
Updating to version 2.0.7 (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
Downloading (100%)
[ErrorException]
zlib_decode(): data error
更新为阿里云镜像
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
切换到项目目录下 (包含composer.json文件)
再执行 composer self-update 命令