Log Message:
Update to 1.02

Upstream changes:
1.02 - Todd Rinaldo <toddr@cpan.org> 2020-01-29
    - Invoke new as a class method in docs and practice.
    - Add support for COW PVs when returning key values. This will hopefully
      deduplicate returned strings where possible.
    - Adjust tests to skip exists tests on 5.8.1, not 5.6.2
    - Optimize cdb_hashadd as a inline macro
    - Croak if atomic re-write from the temp to the final file fails.

1.01 - Todd Rinaldo <toddr@cpan.org> 2020-01-27
    - Fix MANIFEST so Changelog is shpped.
    - Address file descriptor leak in CDB_File.

1.00 - Todd Rinaldo <toddr@cpan.org> 2020-01-19
    - Enable github actions for automated testing
    - Switch to github issues.