Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit 8.2 -> satisfiable by phpunit/phpunit[8.2.0]. - phpunit/phpunit 8.2.0 requires php ^7.2 -> your php version (8.2.21) does not satisfy that requirement. Problem 2 - orchestra/testbench[v9.0.0, ..., 9.x-dev] require phpunit/phpunit ^10.5 || ^11.0.1 -> found phpunit/phpunit[dev-main, 10.5.0, ..., 10.5.x-dev, 11.0.1, ..., 11.3.x-dev (alias of dev-main)] but it conflicts with your root composer.json require (8.2). - Root composer.json requires orchestra/testbench 9.* -> satisfiable by orchestra/testbench[v9.0.0, ..., 9.x-dev].

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/