Update to 0.31
    
    - New upstream release 0.31
      - Support use Foo::Bar (); etc. (CPAN RT#50723)
      - "use" after statement with trailing comment was ignored (CPAN RT#71761)
      - Fixed the Pod::Simple encoding issue
      - Fix incorrect regexp (ref gh-5)
      - Avoid regex features introduced only in later perl (close gh-5)
      - Use plan() instead of done_testing() (ref gh-5)
      - Add support for bareword leading hyphyen, in-place arrayref and hashref
      - Proper version number for older releases in Changes file