adding marshmallow
@@ -1410,6 +1410,7 @@ _Libraries for working with JSON._
- [jzon](https://github.com/zerosnake0/jzon) - JSON library with standard compatible API/behavior.
- [kazaam](https://github.com/Qntfy/kazaam) - API for arbitrary transformation of JSON documents.
- [mapslice-json](https://github.com/mickep76/mapslice-json) - Go MapSlice for ordered marshal/ unmarshal of maps in JSON.
+- [marshmallow](https://github.com/PerimeterX/marshmallow) - Performant JSON unmarshaling for flexible use cases.
- [mp](https://github.com/sanbornm/mp) - Simple cli email parser. It currently takes stdin and outputs JSON.
- [OjG](https://github.com/ohler55/ojg) - Optimized JSON for Go is a high performance parser with a variety of additional JSON tools including JSONPath.
- [omg.jsonparser](https://github.com/dedalqq/omg.jsonparser) - Simple JSON parser with validation by condition via golang struct fields tags.
