Modified sklearns version

setup.py

@@ -176,7 +176,7 @@ def setup_package():
     keywords = ('machine learning, supervised learning, classification, '
                 'ensemble methods, boosting, kernel')
     packages = find_packages(exclude=['*.tests'])
-    install_requires = ['scikit-learn>=0.19', 'numpy', 'scipy', 'cvxopt' ]
+    install_requires = ['scikit-learn>=0.22', 'numpy', 'scipy', 'cvxopt' ]
     python_requires = '>=3.5'
     extras_require = {
         'dev': ['pytest', 'pytest-cov'],