Yii Middleware Dispatcher version 5.3 was released. In this version:

• add MiddlewareCollector for Yii Debug package;
• support callable that returns Psr\Http\Server\RequestHandlerInterface as middleware definition;
• change PHP constraint in composer.json to 8.1 - 8.4;
• mark MiddlewareStack::$fallbackHandler readonly;
• raise minimum PHP version to ^8.1 and make all possible properties readonly.