patch 8.2.0683: Vim9: parsing type does not always work

Problem:    Vim9: parsing type does not always work.
Solution:   Handle func type without return value.  Test more closures.
            Fix type check offset.  Fix garbage collection.
diff --git a/src/version.c b/src/version.c
index 21cda47..ae08554 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    683,
+/**/
     682,
 /**/
     681,