GHSA-6jvx-8ch9-j2jr Laravel Cookie serialization vulnerability

• Packagist laravel/framework: >= 5.5.0, < 5.6.30 → fixed in 5.6.30

Laravel 5.6.30 is a security release of Laravel and is recommended as an immediate upgrade for all users. Laravel 5.6.30 also contains a breaking change to cookie encryption and serialization logic. Refer to laravel advisory for more details and read the notes carefully when upgrading your application.