React 16 breaks library during extension load

[vaughnkoch]

Because of this change in React 16, accessing PropTypes in React now throws an error, which makes it impossible to load the js module.
https://reactjs.org/warnings/dont-call-proptypes.html

The breaking line seems to be line 5 in component.js. I think there's a simple fix available if you follow the above link.

const { bool, object } = React.PropTypes;

Thanks for creating a cool library btw :)