patch 8.2.3897: Vim9: second argument of map() and filter() not checked

Problem:    Vim9: the second argument of map() and filter() is not checked at
            compile time.
Solution:   Add more specific type check for the second argument.

src/version.c

@@ -749,6 +749,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3897,
 /**/
     3896,
 /**/