fix(Dropdown): fix deepEqual bug

[pedromtorres]

Fixes #3000.

[welcome]

💖 Thanks for opening this pull request! 💖

Here is a list of things that will help get it across the finish line:

• Run yarn lint locally to catch formatting errors. This will fix some errors automatically, commit and push any changes.
• Run yarn test locally to catch errors. This ensures all components still behave as they should.
• Run yarn start to run the doc site locally and try a few pages, ensuring everything is in good working order.
• Include tests when adding/changing behavior.

We get a lot of pull requests on this repo, so please be patient and we will get back to you as soon as we can.

[codecov-io]

Codecov Report

Merging #3104 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #3104      +/-   ##
==========================================
- Coverage   99.92%   99.92%   -0.01%     
==========================================
  Files         163      163              
  Lines        2742     2740       -2     
==========================================
- Hits         2740     2738       -2     
  Misses          2        2

Impacted Files	Coverage Δ
src/modules/Dropdown/Dropdown.js	99.75% <100%> (-0.01%)	⬇️

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[mvanlonden]

This fixes the same issue I'm running into

[levithomason]

I linked the issue to the code change. Tests just need to pass. Thanks for the PR!

[joetuson]

Would love to see this merged. Seems like codecov is stalled?

Thanks for all the work you do!

[welcome]

Congrats on merging your first pull request! 🎉🎉🎉

[levithomason]

Released in semantic-ui-react@0.82.4.