Caffa

Migrate to boost regex, boost uuid plus minor fixes

Swap out nlohmann-json for boost-json

Nlohmann JSON is just too slow for the purpose.

What's Changed
* Visitor simplified by lindkvis in https://github.com/lindkvis/caffa/pull/118
* Volatile by lindkvis in https://github.com/lindkvis/caffa/pull/119


**Full Changelog**: https://github.com/lindkvis/caffa/compare/v1.5.1...v1.5.2

What's Changed
* Simplifications by lindkvis in https://github.com/lindkvis/caffa/pull/111
* Split data model by lindkvis in https://github.com/lindkvis/caffa/pull/112
* UUID move by lindkvis in https://github.com/lindkvis/caffa/pull/113
* Data model split by lindkvis in https://github.com/lindkvis/caffa/pull/114


**Full Changelog**: https://github.com/lindkvis/caffa/compare/v1.4.1...v1.5.0

What's Changed
* Fix tests by lindkvis in https://github.com/lindkvis/caffa/pull/107
* API cleanup by lindkvis in https://github.com/lindkvis/caffa/pull/109


**Full Changelog**: https://github.com/lindkvis/caffa/compare/v1.3.0...v1.4.0

Add readOnly and writeOnly properties for fields and make sure write only fields are added to schema.

**Full Changelog**: https://github.com/lindkvis/caffa/compare/v1.2.2...v1.2.3