:art: tojson handle comma after array

diff --git a/plug b/plug
index 6e224703f1e29329b25d5f39892112cb02132486..1753198efbf0afa6d21a05cd37b3fdba9e862bb1 160000 (submodule)
--- a/plug
+++ b/plug
@@ -1 +1 @@
-Subproject commit 6e224703f1e29329b25d5f39892112cb02132486
+Subproject commit 1753198efbf0afa6d21a05cd37b3fdba9e862bb1