composer版本切换

1、可以将 Composer 降级到 1.x 版，操作如下：

composer self-update --1

2、如果您需要切换回 Composer 2.x 版，只需键入:

composer self-update --2

3、更多信息
https://5balloons.info/fix-you-are-using-composer-2-some-plugins-seem-to-be-incompatible-with/