Update deps

[rukai]

Notable improvements is the move of derive_builder to syn 2.0, allowing users to eliminate the duplicate syn 1.0 from their dep tree.

Codegen:

I verified that cargo run -p protocol_codegen still succeeds.

kafka-protocol crate:

The changelog does not list anything that would break compilation or runtime behavior for users https://github.com/colin-kiegel/rust-derive-builder/blob/master/derive_builder/CHANGELOG.md
So I believe this can be released as a non-breaking change.

[tychedelia]

Great! Just leaving a note here about a discussion we had in #41 to potentially move the builder generation into the crate, but this is a great improvement for now.

Even though this isn't a breaking change, I may wait to see if #44 clears on Monday to bundle these together. Leave a review there if you have any concerns.