Bump @grpc/proto-loader from 0.5.2 to 0.5.3
Bump @grpc/proto-loader from 0.5.2 to 0.5.3

Bumps [@grpc/proto-loader](https://github.com/grpc/grpc-node) from 0.5.2 to 0.5.3.
- [Release notes](https://github.com/grpc/grpc-node/releases)
- [Commits](https://github.com/grpc/grpc-node/compare/@grpc/proto-loader@0.5.2...@grpc/grpc-js@0.5.3)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
malijs/mali