setup.py: fix PyJWT dependency declaration
setup.py: fix PyJWT dependency declaration

dcos/dcos,branden/dcos,mesosphere-mergebot/dcos,GoelDeepak/dcos,dcos/dcos,dcos/dcos,surdy/dcos,dcos/dcos,dcos/dcos,GoelDeepak/dcos,mellenburg/dcos,mesosphere-mergebot/dcos,kensipe/dcos,amitaekbote/dcos,branden/dcos,surdy/dcos,mellenburg/dcos,mesosphere-mergebot/mergebot-test-dcos,GoelDeepak/dcos,amitaekbote/dcos,GoelDeepak/dcos,amitaekbote/dcos,branden/dcos,mesosphere-mergebot/dcos,mesosphere-mergebot/mergebot-test-dcos,mesosphere-mergebot/mergebot-test-dcos,mellenburg/dcos,surdy/dcos,mellenburg/dcos,mesosphere-mergebot/mergebot-test-dcos,mesosphere-mergebot/dcos,kensipe/dcos,surdy/dcos,kensipe/dcos,amitaekbote/dcos,branden/dcos,kensipe/dcos