v0.0.91

Changelog:

Additions

• clean_column_names():
  Cleans the column names of the provided Pandas Dataframe and optionally provides hints on duplicate and long column names. This functionality is also added to data_cleaning() by default.

Changes

• small fixes and refinements
  Revert from split = {None, 'pos', 'neg', 'above', 'below'} to split = {None, 'pos', 'neg', 'high', 'low'} for all correlation functions.

• increase test coverage

• update docstrings:
  Several updates to docstrings to improve clarity and conform with numpy style.

• black formatting:
  Format the entire codebase with black.