Update Rust crate tokio to 1.26 [SECURITY]

Author: renovate[bot]

Cargo.lock

@@ -17,7 +17,7 @@ serde_json = "1.0"
 structopt = "0.3"
 thiserror = "1.0"
 time = { version="0.3", default-features=false, features=["local-offset", "macros", "serde", "serde-human-readable", "std"] }
-tokio = { version="1.23", default-features=false, features=["macros", "rt-multi-thread", "time"] }
+tokio = { version="1.26", default-features=false, features=["macros", "rt-multi-thread", "time"] }
 tokio-stream = { version="0.1", default-features=false }
 tokio-util = { version="0.6", default-features=false, features=["time"] }