Support for alternate serialization formats (XStream, Kryo, etc.)

[frohoff]

Allow gadget chains to advertise which serialization formats they are compatible with and choice to be provided via CLI. This will require additional test scaffolding to assert proper execution under various formats and will probable require completion of #23).

[CaledoniaProject]

It's possible to add support of xstream, e.g

The code above works for Struts S2-052 exploit