5.0.0-alpha1

What's Changed

• DEP Dependencies for CMS 6 by @emteknetnz in #382
• API Set extension hook implementation visibility to protected by @emteknetnz in #391
• DEP Limit PHP support for CMS 6 by @GuySartorelli in #414
• MNT Fix some unit tests by @GuySartorelli in #415
• DEP Use PHPUnit 11 by @emteknetnz in #416
• API Use new names for renamed classes by @GuySartorelli in #417
• API Check is instance of SS_List by @emteknetnz in #420
• API Explicity mark nullable parameters for PHP 8.4 by @emteknetnz in #423

Full Changelog: 4.1.0...5.0.0-alpha1