Raise version's in win32 binaries header about zstd

[terrelln]

Will honest raise verion of subsystem/operation system up to 6.0?

I'm not quite sure I understand. Are you saying that zstd.exe is advertising it works with older Windows versions, when it does not? And that we should raise the version that zstd.exe advertises that it supports?

I guess this would involve a change in build scripts, but if you have any advice about how to achieve this, please let us know.

[basid-irk]

For MSVC linker - link /subsystem or build properties.

[stati64]

We work around this with LoadLibraryW() and GetProcAddress() and
then avoiding or emulating absent features.

#define _WIN32_WINNT _WIN32_WINNT_WIN2K
before including windows.h will enumerate all the missing features.