build(deps): bump prost from 0.12.6 to 0.13.3

Bumps [prost](https://github.com/tokio-rs/prost) from 0.12.6 to 0.13.3.
- [Release notes](https://github.com/tokio-rs/prost/releases)
- [Changelog](https://github.com/tokio-rs/prost/blob/master/CHANGELOG.md)
- [Commits](tokio-rs/prost@v0.12.6...v0.13.3)

---
updated-dependencies:
- dependency-name: prost
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -20,7 +20,7 @@ x25519-dalek = "2.0.1"
 
 # grpc
 tonic = { version = "0.11", features = ["tls", "tls-webpki-roots"]}
-prost = "0.12.6"
+prost = "0.13.3"
 tokio = { version = "1", features = ["macros", "rt-multi-thread", "sync", "net", "process", "signal"] }
 tokio-stream = { version = "0.1", features = ["net", "time"] }
 async-stream = "0.3"