Make dot with Bool-arrays type-stable

[dkarrasch]

Fixes #1430.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.88%. Comparing base (5af75df) to head (6fe77f8).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1456      +/-   ##
==========================================
- Coverage   93.91%   93.88%   -0.04%     
==========================================
  Files          34       34              
  Lines       15931    15931              
==========================================
- Hits        14962    14957       -5     
- Misses        969      974       +5     

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[ViralBShah]

Do we want a 1.12 backport on this?

[dkarrasch]

The "issue" is very old, so if this was backportable (or of interest), we should backport it also to the LTS. OTOH, this is so narrow, I'm not sure it's worth risking creating hassle.

[ViralBShah]

Doesn’t seem worth the hassle for LTS for sure.