patch 8.2.3822: leaking memory in map() and filter(), no string in Vim9

Problem:    Leaking memory in map() and filter(), cannot use a string argument
            in Vim9 script.
Solution:   Fix the leak, adjust the argument check, also run the tests as
            Vim9 script. (Yegappan Lakshmanan, closes #9354)
diff --git a/src/version.c b/src/version.c
index 9eecc7a..7467b7c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3822,
+/**/
     3821,
 /**/
     3820,