Add a pip requirement file to allow for easy installation of testing dependencies.
Add a pip requirement file to allow for easy installation of testing dependencies.

dongguangming/jsonpickle,mandx/jsonpickle,mandx/jsonpickle,mandx/jsonpickle,dongguangming/jsonpickle,dongguangming/jsonpickle,dongguangming/jsonpickle,mandx/jsonpickle