Bump google-protobuf and @types/google-protobuf (#112)

Bumps [google-protobuf](https://github.com/protocolbuffers/protobuf-javascript) and [@types/google-protobuf](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/google-protobuf). These dependencies needed to be updated together.

Updates `google-protobuf` from 3.21.2 to 3.21.4
- [Release notes](https://github.com/protocolbuffers/protobuf-javascript/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf-javascript/blob/main/protobuf_javascript_release.bzl)
- [Commits](protocolbuffers/protobuf-javascript@v3.21.2...v3.21.4)

Updates `@types/google-protobuf` from 3.15.6 to 3.15.12
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/google-protobuf)

---
updated-dependencies:
- dependency-name: google-protobuf
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: "@types/google-protobuf"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]