Description of the change

This PR adds PHP 8.4 to our test suite. However, it skips our static analysis with vimeo/psalm because a release that is compatible with PHP 8.4 has not been published yet. More details are here vimeo/psalm#11107.

This PR also removes PHP 8.0 from our CI tests since we are dropping support for that version as it is no longer receiving any updates including security updates.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Maintenance
• New release

Related issues

None

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• "Ready for review" label attached to the PR and reviewers assigned
• Issue from task tracker has a link to this pull request
• Changes have been reviewed by at least one other engineer