A recent upgrade of cargo-vendor changed its output slightly, which
broke all cargoSha256 hashes in nixpkgs.
See https://github.com/NixOS/nixpkgs/issues/60668 for more information.
Since then, a few hashes have been fixed in master by hand, but there
were a lot still to do, so I did all of the ones left over with some
scripts I wrote.
The one hash I wasn’t able to update was habitat's, because it’s
currently broken and the build doesn’t get far enough to produce a
hash anyway.
Motivation: unstable-2018-02-24 (which reports to be
0.19.1, but probably doesn't correspond to any actual
geckodriver release) isn't compatible with the currently
shipped Firefox version 63.0
closesNixOS/nixpkgs#50380
