尝试在 Heroku 中部署时，它返回以下错误：
! The following is the full output from the installation attempt:
!
! > You are using Composer 1 which is deprecated. You should upgrade to Composer 2, see https://blog.packagist.com/deprecating-composer-1-support/
! > Loading repositories with available runtimes and extensions
! > Updating dependencies
! > Your requirements could not be resolved to an installable set of packages.
! >
! > Problem 1
! > - The requested package composer-plugin-api could not be found in any version, …