test fails as documented in read me

[mosheliv]

docker exec -it scikit_multilearn_dev_test_docker python3 -m pytest /home/python-dev/repo fails with :

collected 5 items / 25 errors                                                                                                                                                    

===================================================================================== ERRORS =====================================================================================
____________________________________________________________ ERROR collecting skmultilearn/adapt/tests/test_brknn.py _____________________________________________________________
ImportError while importing test module '/home/python-dev/repo/skmultilearn/adapt/tests/test_brknn.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
home/python-dev/repo/skmultilearn/adapt/__init__.py:33: in <module>
    from .brknn import BRkNNaClassifier, BRkNNbClassifier
home/python-dev/repo/skmultilearn/adapt/brknn.py:2: in <module>
    from ..base import MLClassifierBase
home/python-dev/repo/skmultilearn/base/__init__.py:11: in <module>
    from .base import MLClassifierBase
home/python-dev/repo/skmultilearn/base/base.py:4: in <module>
    from sklearn.base import BaseEstimator, ClassifierMixin
usr/local/lib/python3.6/dist-packages/sklearn/__init__.py:64: in <module>
    from .base import clone
usr/local/lib/python3.6/dist-packages/sklearn/base.py:13: in <module>
    from .utils.fixes import signature
usr/local/lib/python3.6/dist-packages/sklearn/utils/__init__.py:16: in <module>
    from .fixes import _Sequence as Sequence
usr/local/lib/python3.6/dist-packages/sklearn/utils/fixes.py:85: in <module>
    from scipy.special import boxcox  # noqa
usr/lib/python3/dist-packages/scipy/special/__init__.py:648: in <module>
    from ._ellip_harm import ellip_harm, ellip_harm_2, ellip_normal
usr/lib/python3/dist-packages/scipy/special/_ellip_harm.py:7: in <module>
    from ._ellip_harm_2 import _ellipsoid, _ellipsoid_norm
scipy/special/_ellip_harm_2.pyx:5: in init scipy.special._ellip_harm_2 (scipy/special/_ellip_harm_2.c:8501)
    ???
usr/lib/python3/dist-packages/scipy/integrate/__init__.py:59: in <module>
    from ._bvp import solve_bvp
usr/lib/python3/dist-packages/scipy/integrate/_bvp.py:10: in <module>
    from scipy.sparse.linalg import splu
usr/lib/python3/dist-packages/scipy/sparse/linalg/__init__.py:113: in <module>
    from .isolve import *
usr/lib/python3/dist-packages/scipy/sparse/linalg/isolve/__init__.py:6: in <module>
    from .iterative import *
usr/lib/python3/dist-packages/scipy/sparse/linalg/isolve/iterative.py:10: in <module>
    from scipy._lib.decorator import decorator
E   ModuleNotFoundError: No module named 'scipy._lib.decorator'

it works with python instead of python3