gRPC-go Release 1.31.0

[Menghan Li]

gRPC-go 1.31.0 is now released. Full release notes:

API Changes

• balancer: remove deprecated type aliases (#3742)

New Features

• The following new xDS functionalities are added in this release (xDS features supported in a given release are documented here):
  • Requests matching based on path (prefix, full path and safe regex) and headers
  • Requests routing to multiple clusters based on weights
• service config: add default method config support (#3684)
  • Special Thanks: @amenzhinsky
• credentials/sts: PerRPCCreds Implementation (#3696)
• credentials: check and expose SPIFFE ID (#3626)
• protoc-gen-go-grpc: support for proto3 field presence (#3752)

Bug Fixes

• client: set auth header to localhost for unix target (#3730)

Documentation

• doc: mark CustomCodec as deprecated (#3698)
• examples: cleanup README.md (#3738)
• doc: fix references to status methods (#3702)
  • Special Thanks: @evanlimanto

Please see release at: https://github.com/grpc/grpc-go/releases/tag/v1.31.0