chore: replace custom definition of np.isclose with numba's np.isclose

[Saransh-cpp]

Description

Closes #185

Checklist

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't any other open Pull Requests for the required change?
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Before Merging

• Summarize the commit messages into a brief review of the Pull request.

[henryiii]

@jpivarski, should we drop 3.7?

If we wanted to support both for a bit, we could make the workaround conditional instead of immediately dropping it. But I’d only do that with a strong reason.

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: +0.13 🎉

Comparison is base (78faba8) 82.87% compared to head (3865c8d) 83.01%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #348      +/-   ##
==========================================
+ Coverage   82.87%   83.01%   +0.13%     
==========================================
  Files          96       96              
  Lines       11396    11372      -24     
==========================================
- Hits         9445     9440       -5     
+ Misses       1951     1932      -19     

Impacted Files	Coverage Δ
src/vector/backends/_numba_object.py	69.83% <ø> (+0.64%)	⬆️

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[jpivarski]

Fantastic! Yes, please get rid of our custom isclose and require the latest Numba.

[Saransh-cpp]

Great, thanks for the quick reviews!