Add nextest compatibility

[sunshowers]

This commit stack makes criterion compatible with nextest using the rules listed here. Each commit is independently reviewable.

Note that none of these changes do anything special for nextest -- they just make criterion implement more of the libtest command-line interface, just enough to make nextest happy.

Addresses #562 -- once this commit stack lands and a new version of criterion goes out, I'd be happy to advertise compatibility on the nextest site.

[sunshowers]

(Let me know if I should target 0.4 or master for this)

[aldanor]

This is awesome, would be great to have this reviewed and land. Wonder if there is anything blocking?

[bheisler]

No, the only blocker is that I have limited time and energy to spend on open-source work lately. My apologies for the delay, I'll try to get to it at some point.

[sunshowers]

@lemmih do you think you'd be able to get a version out with this soon? Had another request come in today.

[lemmih]

Releases are managed by @bheisler.

[sunshowers]

Hi @bheisler, do you think you'd be able to make a release soon? Thank you so much for maintaining criterion!

[lemmih]

Hi @bheisler, do you think you'd be able to make a release soon? Thank you so much for maintaining criterion!

Brook gave me permission to release a new version. Think you could help me update the CHANGELOG.md? We probably also want to review https://github.com/bheisler/criterion.rs/pull/679 before cutting a release.

[sunshowers]

Thanks @lemmih. Happy to spend some time on this tomorrow. What would be a good way to coordinate our efforts?

[lemmih]

Thanks @lemmih. Happy to spend some time on this tomorrow. What would be a good way to coordinate our efforts?

If you begin updating the changelog, put the changes in a draft PR.

[nbarrios1337]

work-in-progress updates for the changelog -> #680