Update twoxhash to 2.0
Supersedes https://github.com/unicode-org/icu4x/pull/5706
Not currently compatible with the repo MSRV.
Yep, I plan to leave this PR open for now
1.81 MSRV is far away, can we not keep draft PRs cluttering the repo for extended periods of time?
I think it's fine. We have old draft PRs.
And we should clean them up. Most are more work to rebase than to do again, many are not even compatible with current designs anymore.
@Manishearth we are now at 1.81 MSRV
Good catch, thanks!