patch 9.0.2170: Vim9: no support for const/final class/objects vars

Problem:  Vim9: no support for const/final class/objects vars
Solution: Support final and const object and class variables

closes: #13655

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index 5e844a0..afe5aed 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -1,4 +1,4 @@
-*todo.txt*      For Vim version 9.0.  Last change: 2023 Jun 08
+*todo.txt*      For Vim version 9.0.  Last change: 2023 Dec 14
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -122,7 +122,6 @@
 
 Further Vim9 improvements:
 - Classes and Interfaces. See |vim9-classes|
-  - "final" object members - can only be set in the constructor.
   - Cannot use class type of itself in the method (Issue #12369)
   - Getting member of variable with "any" type should be handled at runtime.
     Remove temporary solution from #12096 / patch 9.0.1375.