Add TODOs when upgrading to React@16.3

components/Carbon.js

@@ -39,6 +39,7 @@ class Carbon extends PureComponent {
   }
 
   componentWillReceiveProps(newProps) {
+    // TODO use getDerivedStateFromProps() on React@16.3
     this.handleLanguageChange(newProps.children, { customProps: newProps })
   }
 

components/ImagePicker.js

@@ -46,6 +46,7 @@ export default class extends React.Component {
   }
 
   componentWillReceiveProps(nextProps) {
+    // TODO use getDerivedStateFromProps() on React@16.3
     if (this.state.crop && this.props.aspectRatio !== nextProps.aspectRatio) {
       // update crop for editor container aspect-ratio change
       this.setState({