* Adding type validation, enhancing optional type support and adding test a few more tests.
* Adding support for string-based enum serlalization and deserialization.
* Removing unintentional endline.
* Removing trailing whitespace.
* Adding simpler api as suggested by moisrex.
* Removing explicit optiona<int> and optional<std::string> references and using concepts instead! Credit goes to Lemire for pointing this out and suggesting a concepts based approach here.
* Removing tests that are not relevant for this branch.
* Removing api related changes. That will be done by moisrex.
* Removing unnecessary new endlines.
* Removing tests related to api changes and cleaning-up irrelevant tests.
* removing broken reference
* Removing trailing whitespace
Daniel Lemire