Issue #3399988 by nrogers, ilya.no, viren18febs, sanduhrs, svendecabooter:...

Issue #3399988 by nrogers, ilya.no, viren18febs, sanduhrs, svendecabooter: WebhookDispatcher has incorrect plugin implementation 

src/Plugin/QueueWorker/WebhookDispatcher.php

@@ -2,7 +2,6 @@
 
 namespace Drupal\webhooks\Plugin\QueueWorker;
 
-use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\Core\Queue\QueueWorkerBase;
 use Drupal\Core\Queue\SuspendQueueException;
@@ -10,6 +9,7 @@ use Drupal\webhooks\Entity\WebhookConfig;
 use Drupal\webhooks\Event\ReceiveEvent;
 use Drupal\webhooks\Event\WebhookEvents;
 use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
 
 /**
  * A Webhook dispatcher that dispatches webhooks on CRON run.
@@ -25,17 +25,29 @@ final class WebhookDispatcher extends QueueWorkerBase implements ContainerFactor
   /**
    * The event dispatcher.
    *
-   * @var \Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher
+   * @var \Symfony\Contracts\EventDispatcher\EventDispatcherInterface
    */
   protected $eventDispatcher;
 
   /**
-   * WebhookDispatcherBase constructor.
+   * WebhookDispatcher constructor.
    *
+   * @param array $configuration
+   *   A configuration array containing information about the plugin instance.
+   * @param string $plugin_id
+   *   The plugin_id for the plugin instance.
+   * @param mixed $plugin_definition
+   *   The plugin implementation definition.
    * @param \Symfony\Contracts\EventDispatcher\EventDispatcherInterface $event_dispatcher
    *   The event dispatcher.
    */
-  public function __construct(EventDispatcherInterface $event_dispatcher) {
+  public function __construct(
+    array $configuration,
+    $plugin_id,
+    $plugin_definition,
+    EventDispatcherInterface $event_dispatcher,
+  ) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition);
     $this->eventDispatcher = $event_dispatcher;
   }
 
@@ -43,7 +55,10 @@ final class WebhookDispatcher extends QueueWorkerBase implements ContainerFactor
    * {@inheritdoc}
    */
   public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
-    return new self(
+    return new static(
+      $configuration,
+      $plugin_id,
+      $plugin_definition,
       $container->get('event_dispatcher')
     );
   }