[nlohmann]

The development started in 2013 when C++11 was still modern. Since then, the term "modern C++" is, to my understanding, a synonym for "C++11 and later". Of course, some code may look dated compared to newer C++ constructs, but the main goal is to integrate JSON into any C++ code bases without making it look odd.

The string_view lookup is nearly done, but I did not want to wait for it, because it would have delayed the release even more.

I'm also working on supporting unordered_map - using it as container for objects would be easy if we would just break the existing API - the hard part is to support it with the current (probably bad designed) template API.