patch 8.2.0552: Vim9: some errors not covered by tests

Problem:    Vim9: some errors not covered by tests.
Solution:   Add more tests.  Check Funcref argument types.
diff --git a/src/version.c b/src/version.c
index 4959ab7..2985dd0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    552,
+/**/
     551,
 /**/
     550,