Bracket scikit-learn version (#556)

* Bracket scikit-learn version
* fix circular import

Author: hoffmansc

aif360/algorithms/__init__.py

@@ -1,2 +1 @@
 from aif360.algorithms.transformer import Transformer, addmetadata
-from aif360.algorithms.intersectional_fairness import IntersectionalFairness

docs/source/modules/algorithms.rst

@@ -73,4 +73,4 @@ Algorithms
    :template: class.rst
 
    algorithms.Transformer
-   algorithms.IntersectionalFairness
+   algorithms.intersectional_fairness.IntersectionalFairness

setup.py

@@ -57,7 +57,7 @@
           'numpy>=1.16',
           'scipy>=1.2.0',
           'pandas>=0.24.0',
-          'scikit-learn>=1.0',
+          'scikit-learn>=1.0,<1.6',
           'matplotlib',
       ],
       extras_require=extras,