Moments, cumulants, skewness, kurtosis and related tests
Lukasz Komsta <lukasz.komsta@umlub.pl>, Frederick Novomestky
        <fnovomes@poly.edu>
Functions to calculate: moments, Pearson's kurtosis,
        Geary's kurtosis and skewness; tests related to them
        (Anscombe-Glynn, D'Agostino, Bonett-Seier).