Bump Grpc.Tools from 1.19.0 to 2.31.0 in /GrpcHost

[dependabot-preview]

Bumps Grpc.Tools from 1.19.0 to 2.31.0.

Release notes

Sourced from Grpc.Tools's releases.

Release v1.31.0

This is the 1.31.0 release (galore) 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

The following new xDS functionality is added in this release:

• Requests matching based on path (prefix, full path and safe regex) and headers.
• Requests routing to multiple clusters based on weights.
• The features supported in a given release are documented here.

Other changes:

• Remove MAX_EPOLL_EVENTS_HANDLED_EACH_POLL_CALL to ensure timely processing of events. (#23535)
• Include the target name in top-level DNS error messages. (#23493)
• Remove xds-experimental URI scheme. (#23463)
• fix memory leak of grpc_resource_user_quota. (#22201)
• Store ref to the ExternalConnectivityWatcher in external_watchers_ map. (#23418)
• Update grpclb configuration with field "service_name". (#22345)
• Fix possible deadlock in RemoveExternalConnectivityWatcher. (#23365)
• Enable TLS 1.3 in the C-core and all wrapped languages. (#23165)
• Add message-size check before message decompression with ordering change. (#23293)
• Fix race condition caused by simultaneous updates on SSL server handshaker. (#22647)
• Add missing reset for ping clocks to avoid mistakenly sending GOAWAY frames due to 'too_many_pings'. (#23145)

C++

• Simplify makefile: Get rid of "install" rules with pure make, recommend cmake and bazel instead. (#23412)
• Replaced grpc::string with std::string. (#23350)
• Fix wrong version in gRPCConfigVersion.cmake and grpc++*.pc. (#22982)

C#

• Avoid collisions in cs files generated by Grpc.Tools. (#22869)
• Add Grpc.Auth support for Google.Apis.Auth.ITokenAccessWithHeaders. (#21616)

Objective-C

• Objc support PB runtime import override. (#23298)

Python

Changelog

Sourced from Grpc.Tools'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

Commits

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[dependabot-preview]

Superseded by #105.