Update to 0.038
    
    - New upstream release 0.038
      - Added: Support Exporter.pm's import negation syntax qw( !foo )
      - Added: Support Exporter.pm's regexp import syntax qw( /foo/ )
      - Fix minor error in documentation of generators
      - Improved handling of hashrefs of options passed to tags, and hashrefs of
        options found within %EXPORT_TAGS arrayrefs
      - Only attempt to merge hashes if we're sure they're both really hashes!