Update to 0.06
    
    - New upstream release 0.06:
      - Require Class::Load 0.20 in the code, not just the distro metadata
        (CPAN RT#80002)
      - Weird classes with either an ISA or VERSION constant would cause the XS to
        blow up badly (CPAN RT#79998)
      - Fixed some broken logic that lead to a segfault from the
        014-weird-constants.t test on some Perls (CPAN RT#80059)
    - Bump perl(Class::Load) version requirement to 0.20
    - Drop explicit requirement for perl(Class::Load), no longer needed