Your requirements could not be resolved to an installable set of packages. Problem 1 - phpunit/phpunit[7.5.0, ..., 7.5.20] require php ^7.1 -> your php version (8.1.2) does not satisfy that requirement. - Root composer.json requires phpunit/phpunit ^7.5 -> satisfiable by phpunit/phpunit[7.5.0, ..., 7.5.20].

Process completed with exit code 2.

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v2, actions/cache@v2. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.