Log Message:
Update to 1.900

Upstream changes:
1.900     2013-08-08 14:44:43 America/New_York
          avoid trying to stringify undef, and so avoid a warning (thanks, Alex
          Vandiver)

1.899     2013-08-02 10:53:19 America/New_York
          repackaged, pointed at new bugtracker

          fallback overloads are enabled, so "cmp" will now compare \ 
with string
          overloads... which still might not be what you expect

          code has been futzed with to rely on some 5.6-isms, rather than
          trying to be 5.005 compatible

          a warning has been added: calling ->parse in scalar context gets
          undefined behavior

1.898     2013-02-07
          remove dead link