Log Message:
(pkgsrc)
 - Add two BUILD_DEPENDS for make test
      p5-Plack-[0-9]*:../../www/p5-Plack
      p5-Switch-[0-9]*:../../lang/p5-Switch
(upstream)
 - Update to 0.20
--------------
0.20  2015-10-16 13:55:13 PDT
        - Compile Perl code via a tempfile to support source filters (rkitover) #17
        - chain to original $SIG{__WARN__} when suppressing signal warnings on
          Win32 (rkitover) #16