fix: Deduplicate objects with same color on step export

[lorenzncode]

Resolves #1689.

[adam-urbanczyk]

Thanks for picking this up @lorenzncode , but shouldn't the solution be defining __eq__ and __hash__ for cq.Color?

[lorenzncode]

Yes, that makes sense - thanks for the input @adam-urbanczyk ! I had a few hours on a train to look at this but please feel free to open an alternate PR or edit if you like. I'll give your suggestion a try probably on the way back (cq actually works quite well on a chromebook by the way even cq-editor; x86_64 8GB RAM).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.23%. Comparing base (dfba42f) to head (d7b054d).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1690   +/-   ##
=======================================
  Coverage   95.23%   95.23%           
=======================================
  Files          27       27           
  Lines        6521     6525    +4     
  Branches      970      970           
=======================================
+ Hits         6210     6214    +4     
  Misses        187      187           
  Partials      124      124           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[jmwright]

Looks good, thanks @lorenzncode