C++11 compatibility?

[cxw42]

Thank you for this library, which looks very interesting! I am working in C++11 at the moment and am not able to compile the test program (log attached). Would you be willing to make C++11 compatibility an option? Thank you for considering this request!

The log is for g++ -std=c++11 -g -o test_strong_typedef test_strong_typedef.cpp on gcc 9.3.0 x64.
c++11.log