出现
The "topthink/think-installer" plugin was skipped because it requires a Plugin API version ("^1.0") that does not match your Composer installation ("2.1.0")
解决步骤：
①清除composer之前的镜像：composer config -g --unset repos.packagist
②更新thinkPHP版本：composer update topthink/framework --no-plugins
③重新安装swoole插件：
可参考的一些语句：
composer update --no-plugins
composer require veriteworks/cookiefix --ignore-platform-reqs --no-plugins
composer self-update --1. Than run composer install or composer update again.