add information to C++17 data_types.json
add information to C++17 data_types.json

added the specific unsigned type definitions. Also added `char` as a type. 
Signed object-based Integer <-- class wrappers for primitives are not a thing in C++, but I didn't know how to add this one and I'm moving fast.
codethesaurus/codethesaur.us,codethesaurus/codethesaur.us