Changes

• Improved rendering of variables panel using the new features in Debugger. The variables panel will no longer store serialized view variables, but instead store serialized debug 'node' objects. This fixes all of the issues with unserializable objects being used in templates, and also improves output of objects that implement toArray() as the array value is not used now.
• Official support for PHP8.
• Requires at least CakePHP 4.2.0