Warning from https://repo.packagist.org: Support for Composer 1 is deprecated and some packages will not be available. You should upgrade to Composer

错误提示：

 

 Warning from https://repo.packagist.org: Support for Composer 1 is deprecated and some packages will not be available. You should upgrade to Composer 2. See https://blog.packagist.com/deprecating-composer-1-support/

原因：composer版本太低了

解决方法：升级composer

 升级命令：composer selfupdate

 

 测试结果：