patch 8.1.1859: timer test sometimes fails on Mac

Problem:    Timer test sometimes fails on Mac.
Solution:   Show more info when it fails.
diff --git a/src/version.c b/src/version.c
index ee4bb90..66bd86f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1859,
+/**/
     1858,
 /**/
     1857,