Bump scikit-learn from 0.22.1 to 0.22.2

Bumps [scikit-learn](https://github.com/scikit-learn/scikit-learn) from 0.22.1 to 0.22.2.
- [Release notes](https://github.com/scikit-learn/scikit-learn/releases)
- [Commits](https://github.com/scikit-learn/scikit-learn/compare/0.22.1...0.22.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

requirements-hyperopt.txt

@@ -3,7 +3,7 @@
 
 # Required for hyperopt
 scipy==1.4.1
-scikit-learn==0.22.1
+scikit-learn==0.22.2
 scikit-optimize==0.7.4
 filelock==3.0.12
 joblib==0.14.1