api接口：创建创建代金券批次API

https://pay.weixin.qq.com/wiki/doc/apiv3/wxpay/marketing/convention/chapter3_1.shtml

参数为：{

    "stock_name": "满20减5代金券",

    "comment": "1416770802",

    "belong_merchant": "1416770802",

    "available_begin_time": "2020-11-04T22:00:00.120+08:00",

    "available_end_time": "2020-11-04T10:00:00.120+08:00",

    "stock_use_rule": {

        "max_coupons": 1000,

        "max_amount": 500000,

        "max_coupons_per_user": 1,

        "natural_person_limit": false,

        "prevent_api_abuse": true

    },

    "pattern_info": {

        "description": "满20元可用",

        "merchant_logo": "https://wxpaylogo.qpic.cn/wxpaylogo/PiajxSqBRaEIPAeia7ImvtstvibBibSeibSMvCRcxEQhbHUSTH5YXHURfyA/0",

        "merchant_name": "aaaaaa",

        " coupon_image ": "https://wxpaylogo.qpic.cn/wxpaylogo/PiajxSqBRaEIPAeia7ImvtshaFP8ssjktKZSEKoOUOrcky3pWqXloJVA/0"

    },

    "coupon_use_rule": {

        "fixed_normal_coupon": {

            "coupon_amount": 500,

            "transaction_minimum": 2000

        },

        "combine_use": false,

        "available_merchants": [

            "1416770802"

        ]

    },

    "no_cash": false,

    "stock_type": "NORMAL",

    "out_request_no": "1416770802-rmm0419114720203369912"

}