vs_info`: Include a list of revisions of the document, and their availability.
* `options.open_revs`: Fetch all leaf revisions if `open_revs="all"` or fetch all leaf revisions specified in `open_revs` array. Leaves will be returned in the same order as specified in input array.
* `options.conflicts`: If specified, conflicting leaf revisions will be attached in `_conflicts` array.
* `options.attachments`: Include attachment data.
  * `options.binary`: Return attachment data as Blobs/Buffers, instead of as ba