Bump grpcio from 1.8.4 to 1.21.0

[dependabot-preview]

Bumps grpcio from 1.8.4 to 1.21.0.

Release notes

Sourced from grpcio's releases.

Release v1.21.0

This is the 1.21.0 release (gandalf) of gRPC Core.

Please see the notes for the previous releases here: https://github.com/grpc/grpc/releases. Please consult https://grpc.io/ for all information regarding this product.

This release contains refinements, improvements, and bug fixes, with highlights listed below.

Note: gRPC Python packages are now marked as deprecated for Python 2.7. See the previous announcement here. Python 2.7 support will be removed on January 1, 2020.

Core

• Service Config Changes to set channel in transient failure on invalid service config. (#18946)
• Add a backup poller to c-ares resolver to take better advantage of c-ares query timeout/retry logic. (#17688)
• Pass WSA_FLAG_NO_HANDLE_INHERIT flag to the WSASocketA() to avoid handle leaking on the Windows in case of using CreateProcess() on the server. (#18060)
• Add fallback-at-startup into xds. (#18665)
• Retire the GRPC_ARENA_INIT_STRATEGY env variable. (#18797)
• Fix gevent segfault with C-Ares as DNS resolver. (#18547)
• Explicitly call getsockname after accept for unix sockets to get the sun_path. (#18556)
• RBE Windows c-core build. (#18546)
• Loosen the dependency on the googleapis-common-protos-types gem. (#18635)
• pick_first: don't go into TRANSIENT_FAILURE upon empty update when in IDLE. (#18598)
• Add guard to the tv_nsec field of gpr_now return value. (#18601)
• Re-enable ALPN check in gRPC C core SSL stack. (#18563)

C++

• Global config variables migration. (#18931)
• Make cc_grpc_library compatible with native proto_library and cc_proto_library rules. (#18955)
• Add alarm in callback streaming test. (#18858)
• Make C++ Channel Interceptors work for lame channels. (#18630)

C#

• Support slice-by-slice deserialization (allow accessing payload as ReadOnlySequence when on netstandard2.0). (#18865)
• Add VS integration for design time build of C# projects. (#18678)
• Migrate interceptor types for server-side interceptors to Grpc.Core.Api. (#18914)
• Add info about C# nightly nuget feed. (#18876)
• Upload C# nightly nugets to Artifactory dev nuget feed. (#18871)
• Migrate client API types to Grpc.Core.Api. (#18532)
• Make CallCredentials implementation agnostic (prepare for move to Grpc.Core.Api). (#18652)
• Add BindServiceAttribute. (#18484)
• Provide access to verify_peer_callback from C# (take two). (#18591)

Node

• Add cares glue for libuv event loop. (#18809)

... (truncated)

Changelog

Sourced from grpcio's changelog.

v1.21.0 |May 7, 2019 |May 21, 2019
v1.22.0 |Jun 18, 2019 |Jul 2, 2019
v1.23.0 |Jul 30, 2019 |Aug 13, 2019
v1.24.0 |Sept 10, 2019 |Sept 24, 2019
v1.25.0 |Oct 22, 2019 |Nov 5, 2019
v1.26.0 |Dec 3, 2019 |Dec 17, 2019

Commits

• 7569ba7 Merge pull request #19095 from muxi/v1.21.x
• 5b3e073 Revert "Bump up version to 1.21.1"
• 8ab582e Bump up version to 1.21.1
• 118623d Rename root certificate bundle in gRPC-C++ pod
• afb2242 Merge pull request #19087 from srini100/v1.21.x
• 535d0b1 Regenerate projects
• de94662 version bump to v1.21.0
• 2b06075 Merge pull request #19081 from gnossen/v1.21.x
• 2628983 Actually include README.rst in all packages
• f6601e1 Add python deprecation notices.
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #64.