Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires pestphp/pest ^3.2.4 -> satisfiable by pestphp/pest[v3.2.4, 3.x-dev]. - pestphp/pest[v3.2.4, ..., 3.x-dev] require pestphp/pest-plugin-mutate ^3.0.5 -> satisfiable by pestphp/pest-plugin-mutate[v3.0.5, 3.x-dev] from composer repo (https://repo.packagist.org) but pestphp/pest-plugin-mutate is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance.

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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/