:art: Update ast

diff --git a/ast b/ast
index 89679d16cc7637c0d33d51c2d78d3892644d1c66..d1a31a943136e0a35552fccea1a996b813effd39 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit 89679d16cc7637c0d33d51c2d78d3892644d1c66
+Subproject commit d1a31a943136e0a35552fccea1a996b813effd39