Add Support for Laravel 12

[stefanzweifel]

This PR updates the version constraints to support Laravel 12.

[owenvoke]

I think the CI might need a re-run, as Laravel 12 has been released so the failing L12 ones should actually run now. 👀 However, I tested locally and it looks like the tests are still failing with differences in the naming.

[nbyloff]

@stefanzweifel The tests seem to be failing because the APP_ENV defaults to workbench instead of testing. Unsure why that got changed, but adding this locally to my phpunit.xml, all tests pass. Hopefully then @aarondfrancis can merge?

<php>
    <server name="APP_ENV" value="testing"/>
  </php>