Create relationship entries between versioned I-D to show supersedes/superseded-by relationships

[ronaldtse]

From: https://github.com/ietf-ribose/relaton-data-ids/issues/6#issuecomment-1086791243

• For each bibliographic item, create a supersedes relation between draft-xx-{nn} and draft-xx-{nn+1},
  • draft-xx-{nn} has a relationship of superseded_by to draft-xx-{nn+1}
  • draft-xx-{nn+1} has a relationship of supersedes to draft-xx-{nn}
• There are two catches we need to account for:
  • The first draft may be 00 or 01 or any number. The first draft does not supersede any other item (for now).
  • The draft number sequence may be disjoint, e.g. 00 then 02. We have to accommodate this situation.
  • An item with the latest draft number is clearly not superseded by any other item.

These relationships are important for the BibXML service to be able to show the an I-D in a series of versions.