build(deps): update tonic requirement from 0.8 to 0.9

Updates the requirements on [tonic](https://github.com/hyperium/tonic) to permit the latest version.
- [Release notes](https://github.com/hyperium/tonic/releases)
- [Changelog](https://github.com/hyperium/tonic/blob/master/CHANGELOG.md)
- [Commits](hyperium/tonic@v0.8.0...v0.9.0)

---
updated-dependencies:
- dependency-name: tonic
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

lib/Cargo.toml

@@ -60,7 +60,7 @@ warp-reverse-proxy = { version = "1.0", optional = true, default-features = fals
 tokio = { version = "1.16", features = ["rt", "io-util", "time"] }
 
 # For gRPC
-tonic = { version = "0.8", optional = true }
+tonic = { version = "0.9", optional = true }
 
 protobuf-json-mapping = { version = "3.2", optional = true }
 protobuf = { version = "=3.2.0", optional = true }