Have a return fallback when using targetFrame for Hint component (#1457)

Author: ethanshar

generatedTypes/components/hint/index.d.ts

@@ -166,7 +166,7 @@ declare class Hint extends Component<HintProps, HintState> {
     renderHint(): JSX.Element | undefined;
     renderHintContainer(): JSX.Element;
     renderChildren(): React.ReactElement<any, string | React.JSXElementConstructor<any>> | undefined;
-    render(): React.ReactNode;
+    render(): {} | null;
 }
 declare const _default: React.ComponentClass<HintProps & {
     useCustomTheme?: boolean | undefined;

src/components/hint/index.tsx

@@ -535,7 +535,7 @@ class Hint extends Component<HintProps, HintState> {
     const {onBackgroundPress, testID} = this.props;
 
     if (!this.props.visible && this.state.hintUnmounted) {
-      return this.props.children;
+      return this.props.children || null;
     }
 
     return (