fix: Change AsArrayObject cast to be Laravel's ArrayObject

[wsamoht]

Summary

Support for Laravel's model AsArrayObject cast was added in #1393. It, however, was added using PHP's \ArrayObject object when it should be Laravel's Illuminate\Database\Eloquent\Casts\ArrayObject.

As it is now, using Laravel's methods like toArray throw an error in the editor (like VS Code) saying the method is invalid.

Reference

• Laravel's model Illuminate\Database\Eloquent\Casts\AsArrayObject cast
• Illuminate\Database\Eloquent\Casts\ArrayObject

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• Existing tests have been adapted and/or new tests have been added
• Update the README.md
• Code style has been fixed via composer fix-style