BibFormat: recjson update using BibReformat

* Adds `recjson` to the list of available formats that BibReformat
  could use. (closes #1708)

Signed-off-by: Esteban J. G. Gabancho <esteban.gabancho@gmail.com>
Parameters like `cds_query` (and more) don't exist anymore.  If you update docstring, can you also clean away the ones that are gone?