Customizable equality for Dedupe

[jonalm]

fixes #517

[codecov]

Codecov Report

Merging #518 (76b68fc) into master (39038b2) will increase coverage by 0.23%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #518      +/-   ##
==========================================
+ Coverage   93.52%   93.75%   +0.23%     
==========================================
  Files          32       32              
  Lines        2225     2227       +2     
==========================================
+ Hits         2081     2088       +7     
+ Misses        144      139       -5     

Flag	Coverage Δ
Pkg.test	89.66% <100.00%> (+<0.01%)	⬆️
Run.test	93.57% <100.00%> (+0.23%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/library.jl	95.57% <100.00%> (+0.01%)	⬆️
src/groupby.jl	90.47% <0.00%> (+1.58%)	⬆️
src/core.jl	93.02% <0.00%> (+1.90%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 39038b2...76b68fc. Read the comment docs.

[tkf]

Thanks for the patch! Registering JuliaRegistries/General#56024