0.003     2017-08-06 14:42:11-05:00 America/Chicago

    * Added new predicate for enumerations, one_of().

0.002     2017-08-03 10:56:32-05:00 America/Chicago

    * Major: Correcting the the way required/optional work.
    * Adding a way for subroutine validators to shortcircuit validation,
      which just so happens to be the thing setting optional needed to do.

0.001     2017-08-02 23:07:19-05:00 America/Chicago

    * Initial release.