Consider requiring C++14

[musicinmybrain]

Since version 1.13.0, GoogleTest requires at least C++14. I think (but don’t have a very handy way to verify) that the minimum GCC version for this library,

libecpint/README.md

Line 48 in f07f8b9

* gcc (v6.3.0 and above)

should support C++14, so maybe it’s time to just make that the requirement by adjusting

libecpint/CMakeLists.txt

Line 5 in f07f8b9

set(CMAKE_CXX_STANDARD 11)

to C++14 instead of C++11.

What do you think?

[junghans]

I made #59, which forces C++11 only on the target, so one can then overwrite CMAKE_CXX_STANDARD however needed.

Moving to C++14 would be a good idea additionally.