feat:取消所有订单

@@ -94,6 +94,14 @@ class BinanceFutures
         return $this->requestAccount($method, $path, $param);
     }
 
+    //取消所有订单
+    public function cancelAllOpenOrders($param)
+    {
+        $path   = '/fapi/v1/allOpenOrders';
+        $method = 'DELETE';
+        return $this->requestAccount($method, $path, $param);
+    }
+
     //下单
     public function order($param)
     {