:car: Update ast

diff --git a/ast b/ast
index eca227f7debac5d26875497caffd1a7088651838..e3939cd9cdb1f8aeab49df8db855fea945938ba9 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit eca227f7debac5d26875497caffd1a7088651838
+Subproject commit e3939cd9cdb1f8aeab49df8db855fea945938ba9