add close

src/client.ts

@@ -221,6 +221,13 @@ class Client {
     return '';
   }
 
+  /**
+   * 关闭客户端链接
+   */
+  public close(code?: number, reason?: string): void {
+    this.socket.close(code, reason);
+  }
+
   /**
    * 创建websocket链接
    */