Update for React v16.0.0 "Creating and Contributing new Buttons to AlloyEditor"

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Fix Version/s: 7.0.x
• Component/s: Product Team Frontend Infrastructure
• Labels: None
• Type of Documentation: Developer

Flagged by philip.chapman

Article link: https://help.liferay.com/hc/en-us/articles/360017882692#creating-the-button

Comment: A very useful article! Can this be updated for React version 16? `React.createClass` was deprecated in React v15.5.0 and removed in React v16.0.0. Please refer to TS guidance on: https://issues.liferay.com/browse/LPP-38823 

Thanks!!