Closes #159 - Re-opening #181 to add a test and get review

[EeethB]

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Changes Description

Original PR - xportr_type() updated to drop levels attribute from factor columns that are coerced
This PR - Add a unit test

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7e15498) 100.00% compared to head (937b2ae) 100.00%.

❗ Current head 937b2ae differs from pull request most recent head ab06640. Consider uploading reports for the commit ab06640 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #195   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           12        12           
  Lines          581       581           
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  Hits           581       581           

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[bms63]

Cool!! Thanks for putting a test in here to sway my nervousness. I think factors are going to be a problem for us - but this is a good start to helping to solve them!!