Release protoc_plugin-21.1.2 (#881)

Rename a local variable to avoid proto field name conflicts, re-gener…

…ate protos (#869)

- Rename a local variable to avoid proto field name conflicts.

  This fixes an issue we're seeing with the latest version of
  `package:protoc_plugin` and the dartpad proto definitions.

- Re-generate descriptor protos.

- Update CI config to re-run publishing when labels change.

Release protobuf-3.1.0, protoc_plugin-21.1.0 (#868)

Release protobuf-3.1.0, protoc_plugin-21.1.0 (#868)

Remove protoc_plugin exe from repo, update .gitignore (#851)

Also bump version number as I've retracted the last release.

Fixes #847.

Fix missing protobuf import in grpc files (#845)

Fixes #844.

Release protobuf-3.0.0, protoc_plugin-21.0.0 (#843)

Release protobuf-3.0.0, protoc_plugin-21.0.0 (#843)

Release protobuf-2.1.0, protoc_plugin-20.0.1 (#677)

Release protobuf-2.1.0, protoc_plugin-20.0.1 (#677)