wgl: Switch to Win10 version defines to enable usage of Win10 WGL callbacks

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6228>
diff --git a/meson.build b/meson.build
index 9bf8896..dba847b 100644
--- a/meson.build
+++ b/meson.build
@@ -932,7 +932,7 @@
   pre_args += '-D__EXTENSIONS__'
 elif host_machine.system() == 'windows'
   pre_args += [
-    '-D_WINDOWS', '-D_WIN32_WINNT=0x0601', '-DWINVER=0x0601',
+    '-D_WINDOWS', '-D_WIN32_WINNT=0x0A00', '-DWINVER=0x0A00',
     '-DPIPE_SUBSYSTEM_WINDOWS_USER',
     '-D_USE_MATH_DEFINES',  # XXX: scons doesn't use this for mingw
   ]