Update crate again

[Coltrane Willsey]

Just like #85, the cargo crate is out of date.

[Aiden Fujiwara]

Thanks for the reminder! Unfortunately, we added a path dependency to Foreman, so I had to remove it before we could publish Foreman to crates.io again. That means only the most recent version (1.6.3) can be published. Hopefully that's good enough!