- revised packaging
      - correctly specify test prerequisites as test prerequisites
      - drop unused Test::Exception prereq
      - drop Tie::RefHash prereq that was not used directly
      - only run pod tests for authors
      - ensure all optional tests are run by authors
      - drop use of Test::WWW::Mechanize::PSGI and Test::WWW::Mechanize::Catalyst
        in favor of a simpler user agent