setuptools-bug fixed, extra_requires not correctly identified

[annahedstroem]

Description

• Fixing external bug as identified in: https://github.com/understandable-machine-intelligence-lab/Quantus/actions/runs/4883757121/jobs/8715544577

error in quantus setup command: 'extras_require' must be a dictionary whose values are strings or lists of strings containing valid project/version requirement specifiers.

Implemented changes

• Addition to requirements.txt

[codecov-commenter]

Codecov Report

Merging #258 (971f03c) into main (ff47bc2) will not change coverage.
The diff coverage is n/a.

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##             main     #258   +/-   ##
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  Coverage   92.87%   92.87%           
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  Files          60       60           
  Lines        3198     3198           
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  Hits         2970     2970           
  Misses        228      228