Migrated SelectField AntD tests to @testing-library/react

[kestarumper]

I've encountered a lot of problems. Many related to fireEvent.change not working at all. AntD seems to be doing things differently when it comes to the role etc. It also does some virtualization which makes things harder.

Notes

• Some elements only appear in the DOM when you "click" on the combobox
  • ...but you can't use fireEvent.click, it has to be fireEvent.mouseDown (see references)

Reference

• https://ant.design/docs/blog/testing-migrate
• Cannot test Select with react testing library after upgrading to v4 ant-design/ant-design#23009 (comment)
• Impossible to expand Select component dropdown programatically ant-design/ant-design#22074 (comment)

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 94.61%. Comparing base (9dec81c) to head (e2aa01a).

Files	Patch %	Lines
packages/uniforms-antd/src/SelectField.tsx	87.50%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@                 Coverage Diff                 @@
##           select-field-tests    #1312   +/-   ##
===================================================
  Coverage               94.60%   94.61%           
===================================================
  Files                     231      231           
  Lines                    3821     3823    +2     
  Branches                 1029     1030    +1     
===================================================
+ Hits                     3615     3617    +2     
  Misses                     82       82           
  Partials                  124      124           

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