chore(deps-dev): bump @grpc/proto-loader from 0.7.11 to 0.7.12

Bumps [@grpc/proto-loader](https://github.com/grpc/grpc-node) from 0.7.11 to 0.7.12.
- [Release notes](https://github.com/grpc/grpc-node/releases)
- [Commits](https://github.com/grpc/grpc-node/compare/@grpc/proto-loader@0.7.11...@grpc/proto-loader@0.7.12)

---
updated-dependencies:
- dependency-name: "@grpc/proto-loader"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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