patch 9.0.2067: xxd: coloring was disabled on Cygwin

Problem:  xxd: coloring was disabled on Cygwin
Solution: don't include WIN32

xxd: Fix that color was disabled on Cygwin

"windows.h" was unintentionally included on Cygwin since 9.0.1834.
This accidentally disabled coloring on Cygwin.
Stop including "windows.h" on Cygwin.

closes: #13414

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Ken Takata <kentkt@csc.jp>
diff --git a/src/version.c b/src/version.c
index e45d7fa..1ae5c98 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2067,
+/**/
     2066,
 /**/
     2065,