patch 8.0.1493: completion items cannot be annotated

Problem:    Completion items cannot be annotated.
Solution:   Add a "user_data" entry to the completion item. (Ben Jackson,
            coses #2608, closes #2508)

src/version.c

@@ -771,6 +771,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1493,
 /**/
     1492,
 /**/