feat(Popup): add disabled prop

[husseyexplores]

Fixes: #3339

Let me know if something is missing from this.

[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 #3377 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #3377   +/-   ##
=======================================
  Coverage   99.89%   99.89%           
=======================================
  Files         170      170           
  Lines        2809     2809           
=======================================
  Hits         2806     2806           
  Misses          3        3

Impacted Files	Coverage Δ
src/modules/Popup/Popup.js	99.23% <100%> (ø)	⬆️

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[levithomason]

This looks great, let's just add a doc site example. See my comment.

Changes were done :)

[welcome]

Congrats on merging your first pull request! 🎉🎉🎉

[levithomason]

Released in semantic-ui-react@0.85.0.