Add PHP 8.4 support and improve test coverage

[tvup]

Description:

This pull request introduces support for PHP 8.4 and improves test coverage for Laravel Fejlvarp. It includes:

• Support for PHP 8.4 in the GitHub Actions workflow.
• Refactoring of the GeoIP lookup function to use Http::get() instead of file_get_contents(), ensuring better error handling and maintainability.
• Content-Type fix for the GeoIP response, explicitly setting it to application/javascript.
• Addition of new feature tests for API endpoints, increasing overall test coverage.
• Fixture-based testing for incidents, improving consistency in tests.
• Database configuration updates for SQLite in-memory testing.
• Dependency updates, including guzzlehttp/guzzle and orchestra/testbench.
• Allowing auto-merge for patch dependencies in renovate.json.

Key Changes:

• Modified: [.github/workflows/run-tests.yml](https://github.com/tvup/laravel-fejlvarp/blob/04cfb5433d112f492ec2932c1702bef705ed1966/.github%2Fworkflows%2Frun-tests.yml) → Added PHP 8.4 to the test matrix.
• Modified: [IncidentController.php](https://github.com/tvup/laravel-fejlvarp/blob/04cfb5433d112f492ec2932c1702bef705ed1966/src%2FHttp%2FControllers%2FApi%2FIncidentController.php) → Replaced file_get_contents() with Http::get().
• Added: [Feature tests for GeoIP lookup](https://github.com/tvup/laravel-fejlvarp/blob/04cfb5433d112f492ec2932c1702bef705ed1966/tests%2FFeature%2FHttp%2FControllers%2FApi%2FIncidentControllerTest.php).
• Added: [Fixture files](https://github.com/tvup/laravel-fejlvarp/tree/04cfb5433d112f492ec2932c1702bef705ed1966/tests/Fixtures) for structured test data.
• Modified: [composer.json](https://github.com/tvup/laravel-fejlvarp/blob/04cfb5433d112f492ec2932c1702bef705ed1966/composer.json) → Updated dependencies for PHP 8.4 compatibility.
• Modified: [TestCase.php](https://github.com/tvup/laravel-fejlvarp/blob/04cfb5433d112f492ec2932c1702bef705ed1966/tests%2FTestCase.php) → Configured SQLite in-memory database for tests.

How to Test:

1. Run the updated test suite:

   composer test

2. Verify that the GeoIP API endpoint correctly returns a Content-Type: application/javascript response.
3. Ensure all feature tests pass, including incident creation and retrieval.

Checklist:

• Verified compatibility with PHP 8.4.
• Ensured all tests pass with SQLite in-memory configuration.
• Improved code maintainability by refactoring GeoIP logic.
• Updated dependencies without breaking compatibility.

Additional Notes:

This PR ensures forward compatibility with PHP 8.4 and strengthens test reliability by introducing fixtures and additional test cases. 🚀