patch 9.0.1883: Vim9: Calling an interface method using a child object fails

Problem:  Vim9: Calling an interface method using a child object fails
Solution: Search methods of parent class

When a class implementing an interface is extended by another class and
a child class instance is passed to a function that accepts the
interface, calling an interface method doesn't work properly.

closes: #13053

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 e525ff6..da48158 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1883,
+/**/
     1882,
 /**/
     1881,