patch 8.1.1140: not easy to find out what neighbors a window has

Problem:    Not easy to find out what neighbors a window has.
Solution:   Add more arguments to winnr(). (Yegappan Lakshmanan, closes #3993)
diff --git a/src/version.c b/src/version.c
index 314f4b7..7c3490e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1140,
+/**/
     1139,
 /**/
     1138,