新增图片消息类草稿的时候，可以通过`cover_info`传图片的裁剪信息：

{
            "article_type":"newspic",
            "title":TITLE,
            "content":CONTENT,
            "need_open_comment":0,
            "only_fans_can_comment":0,
            "image_info":{
                "image_list":[
                    {
                        "image_media_id":IMAGE_MEDIA_ID
                    }
                ]
            },
            "cover_info":{
                "crop_percent_list":[
                    {
                        "ratio": "1_1",
                        "x1":"0.166454",
                        "y1":"0",
                        "x2":"0.833545",
                        "y2":"1"
                    }
                ]
            }
}

https://developers.weixin.qq.com/doc/subscription/api/draftbox/draftmanage/api_draft_add.html

获取草稿时，接口不返回`cover_info`，导致无法获取在微信后台创建的图片消息的裁剪信息：

{
            "title": TITLE,
            "content": CONTENT,
            "thumb_media_id": ID,
            "url": URL,
            "thumb_url": THUMB,
            "need_open_comment": 1,
            "only_fans_can_comment": 0,
            "article_type": "newspic",
            "image_info": {
                "image_list": [
                    {
                        "image_media_id": CONTENT
                    },
                    {
                        "image_media_id": CONTENT
                    },
                    {
                        "image_media_id": CONTENT
                    }
                ]
            },
            // cover_info 不见了，被吃了吗？
        }

https://developers.weixin.qq.com/doc/subscription/api/draftbox/draftmanage/api_getdraft.html

可传不可返回的参数明显不合理，请问什么时候修复？