Problem 1
- Installation request for tymon/jwt-auth ^0.5.12 -> satisfiable by tymon/jwt-auth[0.5.12].
解决方法：
{
"require": {
"nesbot/carbon": "2.16.3 as 1.34.0"
"kylekatarnls/laravel-carbon-2": "^1.0.0"
}
原文：https://www.cnblogs.com/liujie-php/p/12295882.html