patch 8.2.0820: Vim9: function type isn't set until compiled

Problem:    Vim9: function type isn't set until compiled.
Solution:   Set function type early.
diff --git a/src/version.c b/src/version.c
index 63bf51d..a1e4a7f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    820,
+/**/
     819,
 /**/
     818,