Your requirements could not be resolved to an installable set of packages. Problem 1 - phpstan/phpstan[1.2.0, ..., 1.4.10] require php ^7.1|^8.0 -> your php version (5.6.40) does not satisfy that requirement. - phpstan/phpstan[1.5.0, ..., 1.10.64] require php ^7.2|^8.0 -> your php version (5.6.40) does not satisfy that requirement. - Root composer.json requires phpstan/phpstan ^1.2 -> satisfiable by phpstan/phpstan[1.2.0, ..., 1.10.64].

Process completed with exit code 2.

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.