Python documentation: https://docs.python.org/3/library/sys.html#sys.winver

It is DLL version of Python.
Though we don't have DLL library, it is required to load site correctly.

By the document, it is same as python <major>.<minor> version in most of cases.

we are defining them under vm/src/versions.rs