:art: SimdJSON: tojson returns a string

diff --git a/plug b/plug
index 9dd87170d0dc23a65388e61a7e19e3cbe1a1d8b9..6e224703f1e29329b25d5f39892112cb02132486 160000 (submodule)
--- a/plug
+++ b/plug
@@ -1 +1 @@
-Subproject commit 9dd87170d0dc23a65388e61a7e19e3cbe1a1d8b9
+Subproject commit 6e224703f1e29329b25d5f39892112cb02132486