Update prost requirement from 0.12.6 to 0.13.0

Updates the requirements on [prost](https://github.com/tokio-rs/prost) to permit the latest version.
- [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...v0.13.0)

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

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

flutter_ffi_plugin/example/native/hub/Cargo.toml

@@ -13,7 +13,7 @@ crate-type = ["lib", "cdylib", "staticlib"]
 
 [dependencies]
 rinf = "6.14.0"
-prost = "0.12.6"
+prost = "0.13.0"
 tokio = { version = "1", features = ["rt", "sync", "macros", "time"] }
 tokio_with_wasm = { version = "0.6.1", features = [
     "rt",