Update Tokio version

[ala-mode]

Currently Cargo.toml asks for : tokio = { version = "1.25.0", optional = true }

On the branch where we are trying to merge in the fetcher (client side) for the [binary-dealer](https://github.com/zingolabs/binary-dealer) (remote) we specified a newer tokio version : tokio = {version ="1.42.0", features = ["macros", "fs", "rt-multi-thread"]}

Can we or should we update this dependency to a newer version? Or is there a reason this is specifically set to this version?