fix(电子刊)： 购买数量获取失败

 {
   "name": "yohobuywap-node",
-  "version": "6.13.10",
+  "version": "6.13.11",
   "private": true,
   "description": "A New Yohobuy Project With Express",
   "repository": {

@@ -24,7 +24,7 @@ $('.choose-list').on('click', '.choose-item', function(e) {
         let data = $elm.data();
 
         $totalPrice.text(data.price);
-        buyNumber = data.num;
+        buyNumber = data.number;
     }
 
     $activeItem.length && $activeItem.removeClass('active');