:art: update ast

diff --git a/ast b/ast
index ac81e61881213a578cc5798b2a3b156f7d1cac15..368e64e5442209148ef1e8b271e645e05b125fdb 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit ac81e61881213a578cc5798b2a3b156f7d1cac15
+Subproject commit 368e64e5442209148ef1e8b271e645e05b125fdb