build: update scikit-learn version

[senwu]

build: update scikit-learn version

Checklist

• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.
• [ ] I have updated the CHANGELOG.rst accordingly.

[codecov[bot]]

Codecov Report

Merging #120 (94769e6) into master (040ff13) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #120   +/-   ##
=======================================
  Coverage   92.14%   92.14%           
=======================================
  Files          40       40           
  Lines        2024     2024           
  Branches      456      456           
=======================================
  Hits         1865     1865           
  Misses         94       94           
  Partials       65       65           

Flag	Coverage Δ
unittests	92.14% <ø> (ø)

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