Upgrade react-modal to v2.2.4

[dsblv]

Issue:

Storybook was hard crashing if used alongside React 16 beta release.

What I did

I followed error stack traces and found out that the isue was caused by react-modal package that used long gone React.DOM.* helpers.

I swapped it out with the latest version, and it worked! Turns out react-modal had a major release since the dependent-upon 1.7.7, but according to changelog, it went without breaking changes.

I never used seach UI (which uses react-modal) before, but it seems to be working fine.

How to test

• Set up a react project with storybook
• npm install --save react@next react-dom@next
• Run storybook, open http://localhost:9009/
• Expect it not to fail right away
• Try searching for something

[ndelangen]

Thank you,

Tested locally, works fine ✅