docs: def update(self, archive_name, version_metadata):
          '''
          Register a new version for archive ``archive_name``
  
          .. note ::
  
              need to implement hash checking to prevent duplicate writes
          '''
          version_metadata['updated'] = self.create_timestamp()
          version_metadata['version'] = str(
              version_metadata.get('version', None))
  
          if version_metadata.get('message') is not None:
              version_metadata['message'] = str(version_metadata['message'])
  
          self._update(archive_name, version_metadata)