Import Upstream version 1.27.1

.github/ISSUE_TEMPLATE/bug.md

.github/ISSUE_TEMPLATE/feature.md

.github/ISSUE_TEMPLATE/question.md

.github/lock.yml

.github/mergeable.yml

.github/stale.yml

.travis.yml

CODE-OF-CONDUCT.md

CONTRIBUTING.md

Documentation/benchmark.md

Documentation/concurrency.md

Documentation/gomock-example.md

Documentation/grpc-auth-support.md

Documentation/grpc-metadata.md

Documentation/keepalive.md

Documentation/log_levels.md

Documentation/proxy.md

Documentation/rpc-errors.md

Documentation/server-reflection-tutorial.md

GOVERNANCE.md