fix BinGrid::__init__() arg type

[slayoo]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.62%. Comparing base (c683a1a) to head (60e4b9e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #444   +/-   ##
=======================================
  Coverage   90.62%   90.62%           
=======================================
  Files          55       55           
  Lines        2516     2516           
  Branches      142      142           
=======================================
  Hits         2280     2280           
  Misses        163      163           
  Partials       73       73           

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[slayoo]

thanks @jcurtis2