React-Remarkable: createClass is deprecated

[swbloom]

React-Remarkable still uses createClass under the hood, causing the following error to throw:

webpack:///../~/react/lib/lowPriorityWarning.js?:40 Warning: Accessing createClass via the main React package is deprecated, and will be removed in React v16.0. Use a plain JavaScript class instead. If you're not yet ready to migrate, create-react-class v15.* is available on npm as a temporary, drop-in replacement. For more info see https://fb.me/react-create-class

should we consider moving away from react-remarkable to a newer alternative?

[Rchristiani]

This should have been resolved at the time of this issue actually.

There was a commit on April 23rd acdlite/react-remarkable@624845d#diff-1fdf421c05c1140f6d71444ea2b27638 that fixed this. I think we just need to bump our module version in package.json