build(deps): update prost-build requirement from 0.9.0 to 0.11.1

Updates the requirements on [prost-build](https://github.com/tokio-rs/prost) to permit the latest version.
- [Release notes](https://github.com/tokio-rs/prost/releases)
- [Commits](tokio-rs/prost@v0.9.0...prost-build-0.11.1)

---
updated-dependencies:
- dependency-name: prost-build
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -36,7 +36,7 @@ tide = "0.16"
 actix-web = "4"
 
 [build-dependencies]
-prost-build = { version = "0.9.0", optional = true }
+prost-build = { version = "0.11.1", optional = true }
 
 [[bench]]
 name = "family"