Update to 0.04
    
    - New upstream release 0.04
      - To detect a perl with ${^GLOBAL_PHASE}, check for the feature itself
        instead of a specific perl version
      - Update the documentation to reflect the use of ${^GLOBAL_PHASE} if available
      - Stop depending on Scope::Guard for the tests
      - Upgrade ppport.h from version 3.13 to 3.19
    - Drop no-longer-necessary buildreq perl(Scope::Guard)
    - Use DESTDIR rather than PERL_INSTALL_ROOT
    - BR: perl(XSLoader)