Bug Fixes deps: pin 'google-{api,cloud}-core', 'google-auth' to allow 2.x versions (#133) (9032d52) enable self signed jwt for grpc (#138) (95fbb59) Documentation add Samples section to CONTRIBUTING.rst (#134) (4a4c133) Miscellaneous Chores release 2.2.1 (#139) (9c15373)