:art: update submodules

diff --git a/ast b/ast
index 5b97ea6d437d3fbbf5fb3eb138ce6357710cfcfc..b0471f9a421fd8efd6bc220a7615129519b8d87f 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit 5b97ea6d437d3fbbf5fb3eb138ce6357710cfcfc
+Subproject commit b0471f9a421fd8efd6bc220a7615129519b8d87f

diff --git a/util b/util
index 36b32267592b15bf24de28ec1eaa7f35a04c3f5e..b0e1a52d755423967d1ed7793f073cbedfc3788e 160000 (submodule)
--- a/util
+++ b/util
@@ -1 +1 @@
-Subproject commit 36b32267592b15bf24de28ec1eaa7f35a04c3f5e
+Subproject commit b0e1a52d755423967d1ed7793f073cbedfc3788e