patch 8.2.0280: Vim9: throw in :def function not caught higher up

Problem:    Vim9: throw in :def function not caught higher up.
Solution:   Set "need_rethrow".
diff --git a/src/version.c b/src/version.c
index d748416..2ff3460 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    280,
+/**/
     279,
 /**/
     278,