Add event type

Author: vladrusu

src/Cmosguy/Broadcasting/Broadcasters/PushStreamBroadcaster.php

@@ -36,10 +36,10 @@ public function broadcast(array $channels, $event, array $payload = array())
 
         foreach ($channels as $channel) {
             $payload = [
-                'text' => $payload
+                'text' => array_merge(['eventtype' => $event], $payload)
             ];
             $request = $this->client->createRequest('POST', '/pub?id=' . $channel, ['json' => $payload]);
             $response = $this->client->send($request);
         }
     }
-}
+}