Log Message:
Update to 0.24

Upstream changes:
0.24  2018.12.09 MANWAR
      Removed +x from unit test scripts.

0.23  2018.12.08 MANWAR
      Now using ExtUtils::MakeMaker for packaging.

0.22  2018.12.07 MANWAR
      Moved author unit tests to subfolder xt/.

0.21  2018.12.06 MANWAR
      Fixed warning 'Use of uninitialized value $target ..' as reported by \ 
CPANTESTERS.
        https://www.cpantesters.org/cpan/report/f8fc5086-f8e1-11e8-b905-8feee4406f56

0.20  2018.12.05 MANWAR
      Added minimum perl version.