Manually calling React.PropTypes validation function

[guimello]

On React 15, I'm getting a warning related to inline styles being check. As far as I understood, this lib manually calls the React.PropTypes validation function in order to "get" a valid style.

More info about the warning here, and the PR which implemented the check.

This is a huge concern because on React's next major release, these functions won't exist. Maybe this lib should use a standalone library like this one.