:art: Allow #require:[xxx]

diff --git a/ast b/ast
index a7f4b203839d44366733b76e74feac7dab7b2a06..21e5a7e33d5c13c56f61322c7b40fa2c6603f3b6 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit a7f4b203839d44366733b76e74feac7dab7b2a06
+Subproject commit 21e5a7e33d5c13c56f61322c7b40fa2c6603f3b6