Ian Alexander Joiner

Due to https://rustsec.org/advisories/RUSTSEC-2023-0001 we should upgrade tokio to 1.24 ASAP if possible.

Instances where replacement is necessary ``` rusoto/signature/src/signature.rs:391:26 current_time.date().naive_utc() rusoto/signature/src/signature.rs:496:18 date.date().naive_utc() rusoto/signature/src/signature.rs:962:31 let date = NaiveDate::from_ymd(0, 1, 1); ```

Provide optional serde support for intermediate Hasher states

3

I wonder whether we can have some solution like #85 where optional serde support for intermediate Hasher states are available. My use case is to show that two Hashers have...