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a. :py:func:`antropy.perm_entropy` will now return the average entropy across all delays if a list or range of delays is provided.
b. Handle the limit of p = 0 in functions that evaluate the product p * log2(p), to give 0 instead of nan (see `PR3 <https://github.com/raphaelvallat/antropy/pull/3>`_).
c. :py:func:`antropy.detrended_fluctuation` will now return alpha = 0 when the correlation coefficient of the fluctuations of an input signal is 0 (see `PR21 <https://github.com/raphaelvallat/antropy/pull/21>`_).