Log Message:
p5-Data-HexDump: update to 0.04.

0.04 2021-04-03 NEILB
    * Added Data::Peek to SEE ALSO, for DHexDump().
    * SYNOPSIS wasn't a working example.
    * Fixed RT#61974 - couldn't dump "0", for example.

0.03 2021-04-02 NEILB
    * Developer release all green on CPAN Testers, so doing
      a stable release.