Add Laravel 9 support

[erik-ropez]

Description of the change

Please include a summary of the change and which issues are fixed.
Please also include relevant motivation and context.

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

Shortcut stories and GitHub issues (delete irrelevant)

• Fix [SC-]
• Fix fix person_fn #1

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
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• Changes have been reviewed by at least one other engineer

[jonnott]

@erik-ropez See #123

[cyrusradfar]

Closing in favor of #123 .

Thank you!