Update devel/p5-Module-Refresh to 0.13:

0.13 Thu May  3 23:03:00 EDT 2007

* Requires 5.8.1. (Uses tricks that don't work on 5.6). Thanks to DCANTRELL

0.12 Mon Apr 30 15:34:42 EDT 2007

* Requires 5.6. (Causes 5.5 to bus error). Thanks to RJBS.

0.11 Tue Apr 24 13:25:24 EDT 2007

  * Fix for [rt.cpan.org #26536] Test suite uses /tmp with predictable filenames
    Reported by ANDK

0.10_01 Tue May  9 01:21:55 EDT 2006

* Module::Refresh->refresh_module_if_modified($module)
    as suggested by Daisuke Maki

(abs)