:wrench: Update ast

diff --git a/ast b/ast
index 02f63505a564a3329fa07921a592b47a381d5d59..59afb20aba44ec9a89bd3003f0481c09d2c24239 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit 02f63505a564a3329fa07921a592b47a381d5d59
+Subproject commit 59afb20aba44ec9a89bd3003f0481c09d2c24239