updated for version 7.3.551

Problem:    When using :tablose a TabEnter autocommand is triggered too early.
            (Karthick)
Solution:   Don't trigger *Enter autocommands before closing the tab.
            (Christian Brabandt)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    551,
 /**/
     550,
 /**/