-----------Installation failed, deleting ./composer.json----------------------
https://blog.csdn.net/qq_35774849/article/details/107166334
----------------your requirements could not be resolved to an installable set of packages------------
https://blog.csdn.net/qq_39043923/article/details/99736495
解决方法是
删除 composer.lock 文件，重新执行 composer install，这样就能重新生成 composer.lock 文件了