Update pprof requirement from 0.11.1 to 0.13.0 (#31)

Updates the requirements on [pprof](https://github.com/tikv/pprof-rs) to permit the latest version.
- [Changelog](https://github.com/tikv/pprof-rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tikv/pprof-rs/commits)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tests/Cargo.toml

@@ -14,7 +14,7 @@ water = { path = "../crates/water" }
 tracing = "0.1"
 tracing-subscriber = "0.3.17"
 rand = "0.8"
-pprof = { version = "0.11.1", features = ["flamegraph", "protobuf-codec", "prost-codec"] }
+pprof = { version = "0.13.0", features = ["flamegraph", "protobuf-codec", "prost-codec"] }
 anyhow = "1.0.7"
 shadowsocks-service = {version = "1.17.0", features = ["server"]}
 shadowsocks-rust = "1.17.0"