meta: Dependencies declared in multiple crates should be workspace dependencies

[torokati44]

This is to reduce the churn of updating them, and the possibility of them getting accidentally out of sync, therefore dupicated (see for example: #15396).

I have a preliminary list of the most duplicated dependency crates - I can comment it here later if you think it'd be easier to get started with that, instead of discovering them on your own.

Yes, this is shameless "new-contributor-bait". 😉

[homersimpsons]

If I understand correctly the purpose of this task, the following cargo subcommand may help: https://github.com/mainmatter/cargo-autoinherit

[torokati44]

Yes, sounds like it!