```javascript
WXAPI.jdvopCartModifyNumber(token, key, number)
```
+ token 用户登陆凭证
+ key 购物车返回的商品记录的key字段
+ number 商品数量
```json
{
"code": 0,
"msg": "success",
"data": {
"number": 3,
"score": 0,
"price": 61.95,
"items": [
{
"key": "209951",
"goodsId": 209951,
"number": 3,
"pic": "http://img13.360buyimg.com/n12/jfs/t1/184551/15/6470/204477/60b23a8dEa4755c7a/b533ee70a9093637.jpg",
"name": "维达(Vinda) 卷纸 蓝色经典4层140克*10卷 卫生卷筒纸 纸巾",
"price": 20.65,
"selected": true
}
]
}
}
```