patch 9.0.2038: Vim9: object method funcref not cleaned up after use

Problem:  Vim9: object method funcref not cleaned up after use
Solution: Clean up type stack after using object method funcref,
          remove now longer used ISN_DEFEROBJ instrunction

closes: #13360

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>
diff --git a/src/version.c b/src/version.c
index 438e9a0..a0ac2d0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2038,
+/**/
     2037,
 /**/
     2036,