Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires pluswerk/grumphp-config ^7.1 -> satisfiable by pluswerk/grumphp-config[7.1.0]. - pluswerk/grumphp-config 7.1.0 requires andersundsehr/phpstan-git-files ^1.0.2 -> satisfiable by andersundsehr/phpstan-git-files[1.0.2, 1.0.3] from composer repo (https://repo.packagist.org) but andersundsehr/phpstan-git-files is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance.

Process completed with exit code 2.

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/