Fix issue #82: scikit-learn and requirement file update

[Codegass]

This PR fix Issue #82

Like in issue #82, I have also tried to use the package on my Mac, but it seems the dependency of the lib is out-of-date.

There are two fix in this PR.

For local running of the lib:

• The requirement.txt file is fixed with correct version requirements and package name.

For Setup.py for PIP install:

• The setup.py's dependency sklearn is corrected to scikit-learn.

[Thesoul20]

This code can resolve the install issue created by sklearn rename as scikit-learn, Please merge this pull requests. Without this pull, I cannot install the aifeynman package.😩