fintersect columns called y

[mattdowle]

Closes #3034

[codecov]

Codecov Report

Merging #3038 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #3038      +/-   ##
==========================================
+ Coverage   90.87%   90.87%   +<.01%     
==========================================
  Files          61       61              
  Lines       11733    11734       +1     
==========================================
+ Hits        10662    10663       +1     
  Misses       1071     1071

Impacted Files	Coverage Δ
R/setops.R	84.07% <100%> (+0.07%)	⬆️

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