問題描述
Problem 1
- kylekatarnls/update-helper 1.1.1 requires composer-plugin-api ^1.1.0 -> found composer-plugin-api[2.0.0] but it does not match the constraint.
- laravel/framework v5.6.39 requires nesbot/carbon 1.25.* -> satisfiable by nesbot/carbon[1.25.3].
- nesbot/carbon 1.25.3 requires kylekatarnls/update-helper ^1.1 -> satisfiable by kylekatarnls/update-helper[1.1.1].
- laravel/framework is locked to version v5.6.39 and an update of this package was not requested.
You are using Composer 2, which some of your plugins seem to be incompatible with. Make sure you update your plugins or report a plugin-issue to ask them to support Composer 2.
解決
composer update -vvv
composer diagnose
