Add CommandBus contract

Required for the new Saga feature

Author: Jeroen de Graaf

src/Util/Messaging/MessageBus/CommandBus.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Gember\DependencyContracts\Util\Messaging\MessageBus;
+
+interface CommandBus
+{
+    /**
+     * @throws HandlingMessageFailedException
+     */
+    public function handle(object $command): void;
+}