vim-patch:8.2.0047: cannot skip tests for specific MS-Windows platform (#13461)

Problem:    Cannot skip tests for specific MS-Windows platform.
Solution:   Add windowsversion().
0c1e3744ff

src/nvim/main.c

@@ -169,6 +169,14 @@ void early_init(mparm_T *paramp)
   init_normal_cmds();   // Init the table of Normal mode commands.
   highlight_init();
 
+#ifdef WIN32
+  OSVERSIONINFO ovi;
+  ovi.dwOSVersionInfoSize = sizeof(ovi);
+  GetVersionEx(&ovi);
+  snprintf(windowsVersion, sizeof(windowsVersion), "%d.%d",
+           (int)ovi.dwMajorVersion, (int)ovi.dwMinorVersion);
+#endif
+
 #if defined(HAVE_LOCALE_H)
   // Setup to use the current locale (for ctype() and many other things).
   // NOTE: Translated messages with encodings other than latin1 will not