refactor Gaspari Cohn to accelerate it

[veni-vidi-vici-dormivi]

Closes #157

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9b0b76b) 87.90% compared to head (ee18751) 87.90%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #393   +/-   ##
=======================================
  Coverage   87.90%   87.90%           
=======================================
  Files          40       40           
  Lines        1745     1745           
=======================================
  Hits         1534     1534           
  Misses        211      211           

Flag	Coverage Δ
unittests	87.90% <ø> (ø)

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[veni-vidi-vici-dormivi]

Not sure what to do about the linting here @mathause...

[mathause]

Yes this is ugly 😞 How about:

• remove # fmt: off
• call black --line-length 200 mesmer/stats/_gaspari_cohn.py
• add # fmt: off & # fmt: on around the two lines

Can you add a # NOTE: see https://github.com/MESMER-group/mesmer/issues/157 comment?

[mathause]

Thanks 😊