v1.1.0

Cookie now supports the GT\Cookie namespace while keeping existing Gt\Cookie imports working. This release also updates the project's checks and supporting documentation.

• ea5311ae Update the build for PHP 8.1 compatibility.
• 7bcea7ed Create SECURITY.md.
• 74b2358a Add JetBrains sponsorship to README with H1 heading.
• b1e6ae59 Support GT\Cookie alongside the legacy namespace.