Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires vimeo/psalm ^4.3 -> satisfiable by vimeo/psalm[4.3.0, ..., 4.x-dev]. - phpunit/phpunit[10.4.0, ..., 10.5.x-dev] require sebastian/diff ^5.0 -> satisfiable by sebastian/diff[5.0.0, ..., 5.1.x-dev]. - Conclusion: don't install sebastian/diff 5.1.1 (conflict analysis result) - Root composer.json requires phpunit/phpunit ^10.4 -> satisfiable by phpunit/phpunit[10.4.0, ..., 10.5.x-dev].

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/.

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