Bump github.com/gogo/protobuf from 1.2.1 to 1.3.1

[dependabot-preview]

Bumps github.com/gogo/protobuf from 1.2.1 to 1.3.1.

Release notes

Sourced from github.com/gogo/protobuf's releases.

Release v1.3.1

Tested versions:

go 1.12.10
protoc 3.9.1

Bug fixes:

• proto/buffer: fix proto.Buffer marshaling.
  • Thanks: https://github.com/apelisse
• plugin/gostring: generate values instead of pointers when a field is repeated and non-nullable.
  • Thanks https://github.com/godfried
• protoc-gen-gogo/generator: Generate json and custom tags for oneof
  • Thanks: https://github.com/krhubert
• plugin/marshalto: Use ProtoSize() in MarshalTo when enabled for oneof fields.
  • Thanks: https://github.com/gaffneyc

Upstream commits:

• 4c88cc3f1a34ffade77b79abc53335d1e511f25b - all: fix reflect.Value.Interface races.
• 6c65a5562fc06764971b7c5d05c76c75e84bdbf7 - jsonpb: fix marshaling of Duration
• b285ee9cfc6c881bb20c0d8dc73370ea9b9ec90f - Log parsing errors using log pkg

Misc:

• add github workflow config
• protoc update - Updated to protoc 3.9.1

Release v1.3.0

Tested versions:

go 1.12.9
protoc 3.7.1

Improvements:

• plugin/stringer - Handle repeated and/or nullable types a bit better now.
• plugin/size - Remove the loop in sovXXX by using bit twiddling.
  • Thanks: https://github.com/apelisse
• plugin/marshalto - Implemented a reverse marshal strategy which allows for faster marshalling. This now avoids a recursive (and repeated) call to Size().
  • Thanks: https://github.com/apelisse
• plugin/compare - Added support for for oneof types.

Bug fixes:

• protoc-gen-gogo/generator - Fix assignment to entry in nil map.
  • Thanks: https://github.com/tgulacsi
• protoc-gen-gogo/generator - Allows plugins to call RecordTypeUse without panicking.
  • Thanks: https://github.com/fedenusy
• proto/extensions - Fixed set extension regression. We did not clear the extensions before setting.
• io/uint32 - fix uint32reader bug that causes ReadMsg to recreate buffer when lengths are the same.
  • Thanks: https://github.com/SebiSujar
• proto/table_merge: Fix merge of non-nullable slices.
  • Thanks: https://github.com/euroelessar

Upstream commits:

• merged in golang/protobuf commit 318d17de72747ed1c16502681db4b2bb709a92d0 - Add UnimplementedServer for server interface

... (truncated)

Commits

• 5628607 github/workflow - update protoc version to 3.9.1 (#637)
• 09ab773 Issue619safer (#627)
• 8142193 GoString plugin: generate values instead of pointers when a field is repeated...
• 627c0c9 umarshal - refactor skip from recursive calls to a loop. (#636)
• 69adf3e Ghworkflow (#632)
• 8a5ed79 Merge pull request #622 from jmarais/master
• 33d4760 merged in golang/protobuf commit 4c88cc3f1a34ffade77b79abc53335d1e511f25b - a...
• f99a381 merged in golang/protubf commit 6c65a5562fc06764971b7c5d05c76c75e84bdbf7 - j...
• d1969a7 merged in golang/protobuf commit b285ee9cfc6c881bb20c0d8dc73370ea9b9ec90f - L...
• 3f2ed6d Generate json and custom tags for oneof (#611) (#612)
• Additional commits viewable in compare view

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