Bug Fixes deps: pin 'google-{api,cloud}-core', 'google-auth' to allow 2.x versions (#153) (9050b55) enable self signed jwt for grpc (#160) (4cab54a) Documentation add Samples section to CONTRIBUTING.rst (#154) (418f8f0) Miscellaneous Chores release as 2.2.1 (#161) (645b6cc)