Address readthedocs build failure

[bwohlberg]

As a temporary solution, pin sphinx-autodoc-typehints to v1.14.1. See #168.

[codecov]

Codecov Report

Merging #169 (684f1af) into main (445412e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #169   +/-   ##
=======================================
  Coverage   92.13%   92.13%           
=======================================
  Files          48       48           
  Lines        3294     3294           
=======================================
  Hits         3035     3035           
  Misses        259      259           

Flag	Coverage Δ
unittests	92.13% <ø> (ø)

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