chore: Bump all dependencies

[Sword-Smith]

Bumps all dependencies to latest version, or newer.

[coveralls]

coverage: 97.767% (+0.1%) from 97.65%
when pulling bdc468d on bump-dependencies
into cf38e3a on master.

[jan-ferdinand]

I'm not opposing this change, since “just use the latest” has been our approach to dependencies for a long time now. However, given that you're asking for my review right now, the recommendation given in “Rust for Rustaceans”¹ is:

The right strategy is to list the earliest version that has all the things your crate depends on […].

The subsection also contains the explanation why this is the right strategy, how to accomplish it, and how to enforce it in CI.²

Footnotes

1. Chapter 5, Section “Versioning”, Subsection “Minimal Dependency Versions”, emphasis mine ↩

2. I don't want to paste the entire section on the public internet but am happy to lend you the book should you be interested. ↩

[Sword-Smith]

Thanks for the insight. As @jan-ferdinand explained, the reason not to bump versions if stuff works is that it'll be harder for other crates to share dependencies with this.