patch 7.4.2113

Problem:    Test for undo is flaky.
Solution:   Turn it into a new style test.  Use test_settime() to avoid
            flakyness.

src/version.c

@@ -758,6 +758,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2113,
 /**/
     2112,
 /**/