Defines that affect code linking against D2.Detours should be scoped PUBLIC

[fortenbt]

One example is the Windows defines at https://github.com/Lectem/D2.Detours/blob/master/source/CMakeLists.txt#L41

[Lectem]

I'm actually not sure if we do want them to be PUBLIC. It would be better to let the user chose their own version ?
Those defines only affect code from the DLL not the API boundary, and are set to convey the minimum version of Windows we support. If the user wants their patch be compatible with a more recent version of Windows, they may do it.

IIRC this was in the context of trying to use D2MOO on Windows7 ?
In that case we should probably add those defines on the D2MOO side