fix(combobox): use enum for state change types

[a88zach]

Closes #

#18145

Webpack will optimize code size and will sometimes convert string enums to integers. This change uses the enum from Downshift so that if Webpack converts the string enum to integers, all code will be converted correctly

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[a88zach]

I have read the DCO document and I hereby sign the DCO.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.22%. Comparing base (f2ba3fd) to head (86b6425).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #18154   +/-   ##
=======================================
  Coverage   83.22%   83.22%           
=======================================
  Files         404      404           
  Lines       14338    14338           
  Branches     4645     4641    -4     
=======================================
  Hits        11933    11933           
  Misses       2243     2243           
  Partials      162      162           

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[guidari]

Thanks for doing that! LGTM 🚀

The .all-contributorsrc file has some changes, mostly it is format. Can you just rollback that, just to keep as it was. You can add your lines and save without format.

[a88zach]

Thanks for doing that! LGTM 🚀

The .all-contributorsrc file has some changes, mostly it is format. Can you just rollback that, just to keep as it was. You can add your lines and save without format.

I can, but I'm out of office until next week

[Gururajj77]

Looks good