feat：运费计算

src/Logistics/Lib/LogisticsInterface.php

@@ -15,6 +15,20 @@ interface LogisticsInterface
 
 	public function onPath(array $param);
 
+	/**
+	 * 获取运费
+	 * @param       $storeId
+	 * @param array $receiver
+	 * @param array $goodsIds
+	 * @return mixed
+	 */
 	public function handleFreight($storeId, array $receiver, array $goodsIds);
 
+	/**
+	 * 获取收货人地址
+	 * @param $id
+	 * @param $storeId
+	 * @return mixed
+	 */
+	public function getReceiver($id, $storeId);
 }
\ No newline at end of file