POST https://api.weixin.qq.com/cgi-bin/media/upload?access_token=ACCESS_TOKEN&type=TYPE

该接口返回的数据结构并不是文档里面的：
{
  "errcode": 0,
  "errmsg": "ok",
  "type": "image",
  "media_id": "MEDIA_ID",
  "created_at": "xxx"
}

实际返回：
{
  "type":"image",
  "media_id":"MEDIA_ID",
  "created_at":1596425839,
  "item":[]
}