Fix window function imports from scipy.signal

[michael-kuhlmann]

In version 1.13.0, scipy removed the ability to import window functions from the signal namespace (see scipy/scipy#19676). Window functions such as hamming have now to be imported from scipy.signal.windows.

scipy 1.13.0 release notes: https://scipy.github.io/devdocs/release/1.13.0-notes.html#pull-requests-for-1-13-0

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.55%. Comparing base (73eae1f) to head (5a70672).

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #100   +/-   ##
=======================================
  Coverage   65.55%   65.55%           
=======================================
  Files          81       81           
  Lines        5496     5496           
=======================================
  Hits         3603     3603           
  Misses       1893     1893           

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