Update all dependencies (Cargo.lock)

This is simply the result of running `cargo update` without touching
Cargo.toml (required since we currently only use dependabot to update
direct dependencies and not indirect/transitive dependencies and useful
to avoid a lot of dependabot PRs for minor/patch updates that can be
bundled, like in this commit).

Signed-off-by: Michael Weiss <[email protected]>