fix:编码和过滤

@@ -113,7 +113,10 @@ class Client implements ClientInterface
             ] + $pathQueryArray;
         $data['sign'] = SignatureUtil::generate($data, Arr::get($this->config, 'app_secret'));
         $response     = $this->guzzleClient->request($this->request->getMethod(), $this->request->getPath(), [
-            $key => $data
+            $key                    => $data,
+            RequestOptions::HEADERS => [
+                'Content-Type' => 'application/json;charset=UTF-8',
+            ]
         ]);
 
         return new Response($response);

@@ -310,7 +310,9 @@ class OrdersB2cAddRequest extends Request
      */
     public function appendOrderGoods($goods_id, $good_name, $price, $num, $dec_total, $deliveryItemId)
     {
-        $item = ['index' => count($this->order_goods) + 1] + get_defined_vars();
+        $item = ['index' => count($this->order_goods) + 1] + array_filter(get_defined_vars(), function ($v) {
+                return !(is_null($v) || $v === '');
+            });
 
         return parent::append('order_goods', count($this->order_goods), $item);
     }