Migrate to PyWavelet for CWT

[igor-pechersky]

https://github.com/blue-yonder/tsfresh/blob/main/tsfresh/feature_extraction/feature_calculators.py#L1356 uses scipy.signal.cwt
However, that method was deprecated more the year ago, and will be removed from the next SciPy release
scipy/scipy@7819f1b

Could we migrate to PyWavelet?

[igor-pechersky]

#1097

[nils-braun]

Thank you very much @igor-pechersky!