:art: update modules

diff --git a/ast b/ast
index d460cbba959c3706c9488511c097fb6d0ed9e871..cf6c862c8fa15f487301df082c7f338c0ccd4e25 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit d460cbba959c3706c9488511c097fb6d0ed9e871
+Subproject commit cf6c862c8fa15f487301df082c7f338c0ccd4e25

diff --git a/util b/util
index 8a433d3220026c2819e3e27d00e014c6b73b5def..121ef41fd11302b3293fd64516c2c620a8e1a9bf 160000 (submodule)
--- a/util
+++ b/util
@@ -1 +1 @@
-Subproject commit 8a433d3220026c2819e3e27d00e014c6b73b5def
+Subproject commit 121ef41fd11302b3293fd64516c2c620a8e1a9bf