Support cargo-binstall

[Fishrock123]

cargo-edit is pretty handy in CI contexts but compiling it each time can be a bit arduous.

It would be nice if cargo-edit supported using cargo-binstall via uploaded binaries to GitHub releases or similar. Being able to pull binaries directly would be much more handy for CI projects.

[epage]

I feel like providing more streamlined CI support for cargo-edit would convey a programmatic stability we do not have.

1. My goal for this project is to kill it off. By that, I mean we merge the commands into cargo. For cargo-upgrade, we are tracking that here
2. As we are still figuring out the UX for merging into cargo, we are very free with doing major UX changes in appropriately marked breaking releases.