Merge branch 'master' into fix/typed-struct

Makefile

build.json

examples/pubsub/main.cc

include/grpc++/channel_interface.h

include/grpc++/impl/internal_stub.h

include/grpc++/impl/rpc_method.h

include/grpc++/impl/rpc_service_method.h

include/grpc/grpc.h

src/compiler/cpp_generator.cc

src/core/surface/channel.c

src/core/surface/init.c

src/cpp/client/channel.cc

src/cpp/client/channel.h

src/cpp/client/generic_stub.cc

src/node/examples/pubsub/empty.proto

src/node/examples/pubsub/label.proto

src/node/examples/pubsub/pubsub.proto

src/node/examples/pubsub/pubsub_demo.js

src/ruby/.rubocop_todo.yml

src/ruby/bin/interop/interop_client.rb