生成售后单文档地址：https://developers.weixin.qq.com/miniprogram/dev/platform-capabilities/business-capabilities/ministore/minishopopencomponent2/API/aftersale/add_new.html

接口名： https://api.weixin.qq.com/shop/ecaftersale/add?access_token=xxx

appId: wxdbffae1230d8fa2b

请求参数：{
    "out_order_id":"1313384462583918494",
    "openid":"oyyeq5TgJhcT19y6-ieJA0f6riQY",
    "out_aftersale_id":"7897665432",
    "type":1,
    "product_info":{
        "out_product_id":"567339",
        "out_sku_id":"5673391817343370",
        "product_cnt":1
    },
    "orderamt":10,
    "refund_reason":"xxx",
    "refund_reason_type":1
}