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)
diff --git a/src/version.c b/src/version.c
index be5f864..261e3d7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1493,
+/**/
     1492,
 /**/
     1491,