convert between Perl data structures, YAML and JSON with unicode support (I believe ...)

Changes for 0.22 - 2023-10-06T11:00:00Z

• Switched from YAML to YAML::PP because the former failed on some tricky input, see github.com/ingydotnet/yaml-pm/… Added extra test file (t/13-yaml-tricky-cases.t) for testing these cases. Added extra author test suit (xt/deficiencies run with make deficiencies) to test the tricky cases for all YAML, YAML::PP, YAML::XS Enclosed within eval {} all JSON::* calls (which were not already enclosed)