Bump grpcio from 1.8.4 to 1.28.1

[dependabot-preview]

Bumps grpcio from 1.8.4 to 1.28.1.

Release notes

Sourced from grpcio's releases.

Release v1.28.1

This is the 1.28.1 release (galactic) 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 is a patch specifically for the Python bindings to address grpc/grpc#22546.

Python

• Backport #22549 to 1.28 (Only load simple stubs code on 3.6+ interpreters). (#22550)

Release v1.28.0

This is the 1.28.0 release (galactic) 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.

Core

• feat: add x-goog-user-project header from quota_project_id field. (#21324)
• Reintroduce #21527 (boringssl submodule unification - take two). (#21833)
• Reintroduce #21527 (boringssl submodule unification). (#21797)
• Treat an empty http_proxy mean "Don't use proxy" and skip parsing it. (#21632)

C++

• This release adds an experimental client side implementation of xDSv2 APIs. This allows a gRPC client written in C++ to receive configuration from an xDSv2 API compatible server and use that configuration to load balance RPCs. In this release, only the virtual host matching and cluster route action is supported. More features will be added in future.
• Cherrypick #22147: xds: send no-overprovisioning client capability and populate user_agent fields. (#22177)
• Fix regression in MSVC runtime flag. (#21792)
• Unify boringssl submodules and use non-developer boringssl cmake build. (#21527)

Objective-C

• Fix ObjC memory consumption increase as app runs. (#21798)

Python

• Backport Simple Stubs Codegen to 1.28. (#22310)
• [Aio] Generate gRPC AsyncIO API Reference. (#21987)
• Experimental: Implement Top-Level Invocation Functions Not Requiring an Explicit Channel. (#21954)
• [Aio] Implement health checking servicer in AsyncIO. (#22028)
• [Aio] Prohibit mixing two styles of API on client side. (#21910)
• [Aio] Add channel_ready helper function. (#21885)

... (truncated)

Changelog

Sourced from grpcio's changelog.

gRPC Release Schedule

Below is the release schedule for gRPC Java, Go and Core and its dependent languages C++, C#, Objective-C, PHP, Python and Ruby.

Releases are scheduled every six weeks on Tuesdays on a best effort basis. In some unavoidable situations a release may be delayed or a language may skip a release altogether and do the next release to catch up with other languages. See the past releases in the links above. A six-week cycle gives us a good balance between delivering new features/fixes quickly and keeping the release overhead low.

Releases are cut from release branches. For Core and Java repos, the release branch is cut two weeks before the scheduled release date. For Go, the branch is cut just before the release. An RC (release candidate) is published for Core and its dependent languages just after the branch cut. This RC is later promoted to release version if no further changes are made to the release branch. We do our best to keep head of master branch stable at all times regardless of release schedule. Daily build packages from master branch for C#, PHP, Python, Ruby and Protoc plugins are published on packages.grpc.io. If you depend on gRPC in production we recommend to set up your CI system to test the RCs and, if possible, the daily builds.

Names of gRPC releases are here.

Release	Scheduled Branch Cut	Scheduled Release Date
v1.17.0	Nov 19, 2018	Dec 4, 2018
v1.18.0	Jan 2, 2019	Jan 15, 2019
v1.19.0	Feb 12, 2019	Feb 26, 2019
v1.20.0	Mar 26, 2019	Apr 9, 2019
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
v1.27.0	Jan 14, 2020	Jan 28, 2020
v1.28.0	Feb 25, 2020	Mar 10, 2020
v1.29.0	Apr 7, 2020	Apr 21, 2020
v1.30.0	May 19, 2020	Jun 2, 2020
v1.31.0	Jun 30, 2020	Jul 14, 2020
v1.32.0	Aug 11, 2020	Aug 25, 2020
v1.33.0	Sept 22, 2020	Oct 6, 2020
v1.34.0	Nov 3, 2020	Nov 17, 2020
v1.35.0	Dec 15, 2020	Dec 29, 2020
v1.36.0	Jan 26, 2021	Feb 9, 2021

Commits

• cb81fe0 Merge pull request #22563 from ericgribkoff/cherry_pick_pip
• cba15cd Merge pull request #22562 from gnossen/bump_to_1_28_1
• a0d71dc Merge pull request #22550 from gnossen/simple_stubs_3_6_and_up_backport
• 7c9b587 Merge pull request #22560 from ericgribkoff/update_pip
• 03e874b Regenerate projects
• 1bf863a Make skipIf stricter
• 99e1cb8 Modify tests accordingly
• bc6fc51 Revert "Add 3.5 as default interpreter version"
• 895f552 Add 3.5 as default interpreter version
• 2292b65 Add version check for Python 3.6 to simple stubs
• Additional commits viewable in compare view

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Superseded by #115.