fix serializing DictionaryDispatch

Author: Waridley

gdnative-core/src/core_types/variant/serde.rs

@@ -139,7 +139,9 @@ impl Serialize for VariantDispatch {
             NodePath(v) => newtype_variant!(VariantType::NodePath, v),
             Rid(v) => newtype_variant!(VariantType::Rid, v),
             Object(_) => newtype_variant!(VariantType::Object, &Option::<()>::None),
-            Dictionary(v) => newtype_variant!(VariantType::Dictionary, v),
+            Dictionary(v) => {
+                newtype_variant!(VariantType::Dictionary, &DictionaryDispatch(v.new_ref()))
+            }
             VariantArray(v) => {
                 //Allows serializing to non-self-describing formats by avoiding serializing `Variant`s
                 let vec = v.iter().map(|v| v.dispatch()).collect::<Vec<_>>();