Upgrade xo to v0.57.0 and lint sources, tests, and examples

[make-github-pseudonymous-again]

Disabled unicorn/prevent-abbreviations because it introduces too many opinionated changes.

[make-github-pseudonymous-again]

@novemberborn Any idea why the tests are failing on Linux?

[novemberborn]

Any idea why the tests are failing on Linux?

The reporter tests are sensitive to line numbers changing, and they're now only run on Linux.

See my commits here: https://github.com/avajs/ava/compare/upgrade-xo-v0.57.0-1?expand=1

(If you could let me push to your branch I can get them into this PR, or you can cherry-pick them.)

[make-github-pseudonymous-again]

If you could let me push to your branch I can get them into this PR

@novemberborn Is there a safe way to do that?

[novemberborn]

If you could let me push to your branch I can get them into this PR

@novemberborn Is there a safe way to do that?

Yes: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/allowing-changes-to-a-pull-request-branch-created-from-a-fork

[make-github-pseudonymous-again]

It does not seem to be available on this PR for some reason 🤔

[novemberborn]

Can you cherry-pick my commits, or merge my branch from avajs/ava into yours?

[make-github-pseudonymous-again]

Can you cherry-pick my commits, or merge my branch from avajs/ava into yours?

@novemberborn Done.

[novemberborn]

Thanks @make-github-pseudonymous-again!