MAINT prepare new release

[mfeurer]

No description provided.

[codecov-io]

Codecov Report

Merging #764 into develop will decrease coverage by 0.02%.
The diff coverage is 100%.

@@ Coverage Diff @@## develop #764 +/- ##
===========================================
- Coverage 87.72% 87.69% -0.03% 
===========================================
Files 36 36 Lines 4072 4072 ===========================================
- Hits 3572 3571 -1 - Misses 500 501 +1

Impacted Files	Coverage Δ
openml/__version__.py	100% <100%> (ø)	⬆️
openml/flows/functions.py	87.21% <0%> (-0.76%)	⬇️
openml/utils.py	91.13% <0%> (-0.64%)	⬇️
openml/runs/functions.py	82.35% <0%> (+0.28%)	⬆️

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