Use Trove Classifiers to reflect supported Python versions in metadata.
Use Trove Classifiers to reflect supported Python versions in metadata.

--HG--
extra : rebase_source : 553a99d9e182a030c2033a5f4dd0c2b67e0c2fbc

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