patch 8.2.2272: Vim9: extend() can violate the type of a variable

Problem:    Vim9: extend() can violate the type of a variable.
Solution:   Add the type to the dictionary or list and check items against it.
            (closes #7593)
diff --git a/src/version.c b/src/version.c
index d6e92b1..94a22c0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2272,
+/**/
     2271,
 /**/
     2270,