Steven Van

I did not set `JSON_USE_IMPLICIT_CONVERSIONS`. According to the documentation, the default value should be `true`. I explicitly set the variable with `set(JSON_ImplicitConversions ON)` in the CMakeLists.txt, and it still does...

With a minimal example project, I still get the error that a matching overload cannot be found. The output of the build process: ``` ====================[ Build | json_optional | Debug...