描述:服务器composer update报错:Warning from https://repo.packagist.org: Support for Composer 1 is deprecate
1、问题原因,composer 版本太老了
2、解决办法,输入命令
```composer self-update```描述:服务器composer update报错:Warning from https://repo.packagist.org: Support for Composer 1 is deprecate
1、问题原因,composer 版本太老了
2、解决办法,输入命令
```composer self-update```