Add support for Laravel 11, 12 and PHP 8.3, 8.4

[johnnyhawley]

Summary

This PR extends the package to support the latest versions of Laravel and PHP, ensuring compatibility with modern Laravel applications while maintaining support for earlier versions.

Key Changes

• PHP Support: Added PHP 8.3 and 8.4 to the test matrix
• Laravel Support: Added Laravel 11.* and 12.* to the supported versions
• Testbench: Updated testbench versions to match Laravel releases (9.* for Laravel 11, 10.* for Laravel 12)
• Dependencies: Updated composer.json to allow Laravel 11 and 12, PHPUnit 11, and Testbench 9 and 10
• CI/CD: Updated GitHub Actions checkout action from v2 to v4
• Test Configuration: Updated phpunit.xml to use <source> instead of deprecated <coverage> element

Implementation Details

• Configured appropriate version exclusions in the test matrix to respect minimum PHP version requirements for each Laravel version (e.g., Laravel 9 requires PHP 8.0+, Laravel 11 requires PHP 8.2+, Laravel 12 requires PHP 8.3+)
• Maintained backward compatibility with Laravel 9 and 10 while adding forward compatibility with newer versions
• Updated PHPUnit configuration to align with modern PHPUnit standards

[Copilot]

Pull request overview

This PR extends Laravel and PHP version support for the akaunting/laravel-sortable package, adding compatibility with Laravel 11, 12 and PHP 8.3, 8.4 while maintaining backward compatibility with Laravel 9, 10.

Changes:

• Added PHP 8.3 and 8.4 to the test matrix and updated dependencies to support PHPUnit 11
• Added Laravel 11 (with Testbench 9) and Laravel 12 (with Testbench 10) support
• Modernized test infrastructure by updating GitHub Actions checkout from v2 to v4 and migrating PHPUnit configuration from deprecated <coverage> to <source> element

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
phpunit.xml	Migrated from deprecated <coverage> element to <source> for PHPUnit 10+ compatibility
composer.json	Added Laravel 11/12, PHPUnit 11, and Testbench 9/10 to dependency constraints
.github/workflows/tests.yml	Extended test matrix with PHP 8.3/8.4 and Laravel 11/12, added appropriate version exclusions, and updated checkout action to v4

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[Copilot]

Potential missing exclusion for Laravel 12 with PHP 8.2. The PR description states "Laravel 12 requires PHP 8.3+" but the test matrix only excludes PHP 8.0 and 8.1 for Laravel 12, which would allow testing with PHP 8.2. This creates a discrepancy between the documented requirements and the actual test matrix.

If Laravel 12 truly requires PHP 8.3+, add an exclusion for PHP 8.2. If Laravel 12 actually supports PHP 8.2+, the current exclusions are correct, but the PR description should be updated to reflect this.