7.0.0

Summary

• Bump minimum PHP version from ^8.2 to ^8.3 (required by Laravel 13)
• Add illuminate/support: ^13.0 support
• Update dev dependencies: orchestra/testbench: ^11.0, phpunit: ^12.0, larastan: ^3.0
• Expand CI test matrix to include PHP 8.4, 8.5 and Laravel 13 (with testbench 11)
• Exclude unsupported PHP 8.5 + Laravel 10/11 combinations
• Bump phpstan workflow PHP from 8.2 to 8.3
• Add void return types to ServiceProvider boot() and register() methods
• Remove deprecated Swift_Mailer mock reference from TestCase