Update Rust crate tokio to 1.43.0

Author: nextest-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 = "1.43.0", features = ["macros", "sync", "test-util", "time"] }
 tokio-stream = { version = "0.1.17" }