Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php >=5.5.0 but your php version (5.4.45) does not satisfy that requirement.

Process completed with exit code 1.

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