Bump tokio from 1.26.0 to 1.38.2

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.26.0 to 1.38.2.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.26.0...tokio-1.38.2)

---
updated-dependencies:
- dependency-name: tokio
  dependency-version: 1.38.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.lock

@@ -23,5 +23,5 @@ futures = "0.3.31"
 maplit = "1.0.2"
 proptest = { version = "1.6.0", features = ["timeout"] }
 proptest-derive = "0.5.1"
-tokio = { version = "1.21.2", features = ["macros", "sync", "test-util", "time"] }
+tokio = { version = "1.38.2", features = ["macros", "sync", "test-util", "time"] }
 tokio-stream = { version = "0.1.17" }