:bug: Fix postfix op

diff --git a/ast b/ast
index 3a39a0920327c4cd6766c57686d638749942bb09..7be56a100ba9fc51bb63a5f616d278f3b39ceec7 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit 3a39a0920327c4cd6766c57686d638749942bb09
+Subproject commit 7be56a100ba9fc51bb63a5f616d278f3b39ceec7