Revision history for Perl extension gutil::JSON2::XS.

0.12.0 2014.7.9
    Deal with UTF8/wide char hash key

0.11.0 2014.7.9
    Detect Perl undef more correctly

0.10.0 2014.7.5
    Preserve Perl undef <-> JSON null

0.9.0  2014.5.23
    The first release ^_^