Update p5-MooseX-Singleton from version 0.22 to version 0.24.

Pkgsrc changes:
- adjust dependencies
- set PERL5_MODULE_TYPE to Module::Install::Bundled

Upstream changes:
0.24 2010-07-15
    - Require Moose 0.94+. (Dave Rolsky)

0.23 2010-07-15
    - Use modern Moose APIs to avoid warnings from the next Moose. (Dave
      Rolsky)

(seb)