Load and save JSON files with C.
cutil: https://github.com/bitnip/cutil
cygwin: https://www.cygwin.com/install.html
cygwin packages:
gcc-core
gcovr
gdb
make
mingw64-x86_64-gcc-core
mingw64-x86_64-gcc-g++
python3
> make build
> make test
> make coverage
> make docs