patch 8.2.4279: Vim9: cannot change item type with map() after range()

Problem:    Vim9: cannot change item type with map() after range().
Solution:   Split the return type in current type and declared type.
            (closes #9665)
diff --git a/src/version.c b/src/version.c
index 9550478..6d89615 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4279,
+/**/
     4278,
 /**/
     4277,