feat(multihash): update MSRV to 1.60.0 and use new syntax for cargo features

[koushiro]

and some trivial things:

• use sha1 instead of sha-1 dependency
• update strobe-rs v0.7.0 ==> v0.8.1
• update serde-big-array v0.3.2 ==> v0.4.1
• update multihash-derive to edition 2021
• move the resolver = "2" to workspace

[vmx]

Is the resolver = 2 needed in the workspace?

Moving to a new edition is usually a breaking change, hence it wasn't done for the derive crate yet, as I didn't want to do a breaking change release, just for upgrading the edition.

Also bumping the MSRV usually is a breaking change. I'd like to keep doing breaking releases to a minimum. Is there a way doing the crate updates without bumping the MSRV (or was bumping it the whole point?)?

[koushiro]

Is the resolver = 2 needed in the workspace?

The resolver is a global setting for a workspace, and the setting is ignored in dependencies. The setting is only honored for the top-level package of the workspace.

see https://doc.rust-lang.org/edition-guide/rust-2021/default-cargo-resolver.html#details for details.

Moving to a new edition is usually a breaking change, hence it wasn't done for the derive crate yet, as I didn't want to do a breaking change release, just for upgrading the edition.

Also bumping the MSRV usually is a breaking change. I'd like to keep doing breaking releases to a minimum.

I know the upgrading the edition and MSRV are breaking changes, so you can merge this PR next time you need to upgrade the minor version.

[thomaseizinger]

I think most of this happened in #272 now.