Update to 0.013
    
    - New upstream release 0.013
      - Worked around a very weird bug with B's handling of multideref aux_list
        values on 5.22 and 5.24. This could cause a warning like "Use of
        uninitialized value $i in array element at lib/Test/Vars.pm line ..." when
        testing certain Perl constructs for unused vars; this appears to be fixed
        in blead's B