Fix random test failures

0.21 2021, Sat Apr 10th
- Fix Issue: Random test failures
Thanks for Slaven Rezic for persistent reporting

CI Integration etc

0.20 2021, Tue Apr 6th
- Include the link to the repository in META.json
- Add CI Configuration
- Remove listing secondary dependencies
- Tab to Space
- Hide the modules used from testing from CPAN

    Thanks a lot to Gabor Szabo for these improvements

Add perl license information to Makefile.PL

0.19

Release 0.19 with added perl license info