Fix denoising

[tsalo]

Closes #45.

Changes proposed:

• Enabled confound standardization in the denoising step.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 31.55%. Comparing base (9594677) to head (933e3e4).
Report is 24 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #51   +/-   ##
=======================================
  Coverage   31.55%   31.55%           
=======================================
  Files          26       26           
  Lines        2266     2266           
  Branches      359      359           
=======================================
  Hits          715      715           
  Misses       1530     1530           
  Partials       21       21           

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