patch 8.2.1270: Vim9: not skipping over function type declaration

Problem:    Vim9: not skipping over function type declaration with only a
            return type.
Solution:   Skip over the return type. (issue #6507)

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1270,
 /**/
     1269,
 /**/