fix(FormField): fix aria-invalid on error false

[aoelen]

Fixes #4042

If error is false, <Form.Field error={false} /> aria-invalid is set to undefined. So it will not be present anymore. I also added some tests for aria-invalid

[codecov-commenter]

Codecov Report

Merging #4043 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #4043   +/-   ##
=======================================
  Coverage   99.84%   99.84%           
=======================================
  Files         183      183           
  Lines        3276     3280    +4     
=======================================
+ Hits         3271     3275    +4     
  Misses          5        5           

Impacted Files	Coverage Δ
src/collections/Form/FormField.js	100.00% <ø> (ø)
src/modules/Dropdown/Dropdown.js	100.00% <100.00%> (ø)

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[layershifter]

👍

[layershifter]

Can you please update your PR description to have Fixes #4042, this will auto close the issue?

https://docs.github.com/en/github/managing-your-work-on-github/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword

[aoelen]

Can you please update your PR description to have Fixes #4042, this will auto close the issue?

https://docs.github.com/en/github/managing-your-work-on-github/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword

Sorry, forgot about that, just added it :)