MAINT prepare new release

[mfeurer]

This PR prepares a new release.

[janvanrijn]

Can we try to have #567 in the release as well? I can contribute the example today

[glemaitre]

What is the release schedule. I'll like to have #548 as well and I am willing to finish it up right away.

[mfeurer]

There's not really a release schedule yet and there's no hurry at all. My motivation was to get things out as it has been a while since the last release and there have been multiple new issues for problems which we have already solved in the development branch. Therefore, I'm happy to wait for both PRs to have a nice and consistent release. However, it would be great to get this done within the next few days.

[joaquinvanschoren]

Regression (#560) as well please :)

[mfeurer]

What's the current status of #560? I know that the other two are almost done, but I did not follow the regression PR.

[joaquinvanschoren]

It was done, and we did the requested change to enums.
There were some merge conflicts because develop changed. I resolved those, but tests are now failing because of an import error. Looking into that now.

[janvanrijn]

Cool! Let me know when #560 is ready for review and I will go through it again.

[janvanrijn]

Another pretty important issue that should definitely be solved: #569

I will create a PR tomorrow.

[mfeurer]

ping @janvanrijn

[codecov-io]

Codecov Report

Merging #600 into develop will decrease coverage by 0.03%.
The diff coverage is 100%.

@@ Coverage Diff @@## develop #600 +/- ##
===========================================
- Coverage 89.9% 89.87% -0.04% 
===========================================
Files 32 32 Lines 3031 3031 ===========================================
- Hits 2725 2724 -1 - Misses 306 307 +1

Impacted Files	Coverage Δ
openml/__version__.py	100% <100%> (ø)	⬆️
openml/runs/functions.py	87.3% <0%> (-0.23%)	⬇️

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[PGijsbers]

Looks good.