完善使用说明

src/config.php

@@ -4,6 +4,10 @@ return [
     'callback_host' => env('mq_callback_host', 'http://192.168.21.170:8085'),
     'callback'      => '/rocketmq/producer/notify',
     'subscribe'     => [
+        //节点配置 由mq的topic.tag为标识
+        //        '[topic].[tag]' => [
+        //            Test:class
+        //        ]
 
     ]
 ];

src/connection/Config.php

@@ -38,7 +38,7 @@ class Config
     /**
      * @return int
      */
-    public function getTimeOut()
+    public function getTimeOut(): int
     {
         return $this->timeOut ?? 60;
     }