This pins the dependencies of our dependencies so that the
`-Zminimal-versions` flag of cargo nightly will result in a working
build. Ideally the package authors would have their versions set
correctly. The flag is on nightly for a reason, though. Oh well.
The examples and learning plugins have outlived their usefulness, and
this repo already has substantial history in being a boids plugin. I'm
renaming the crate (and repo, but that isn't visible to git) to treat
this simply as a boids repo.
I'm finally starting on the actual Boids flocking algorithm parts.
I don't want to iterate over all the things, and Bevy doesn't seem to
have fast collision testing yet, so I've reached for bevy_spatial to
track my Boids.
