Moving FutureSQL to KDE review

[Kevin Kofler]

Jonah Brüchert wrote:
> I would like to maintain it as an independent library for now, to be
> able to use C++20 features […]

What is the point of allowing to build KDE Frameworks with an older C++ 
standard (what is the minimum these days?) if "many KDE projects" are going 
to depend on a library that requires C++20 to build? Either we can use C++20 
or we cannot.

        Kevin Kofler