fix: unimplemented view export (#328)

Author: Naturalclar

js/UnimplementedView.js

@@ -35,4 +35,4 @@ const styles = StyleSheet.create({
     : {},
 });
 
-module.exports = UnimplementedView;
+export default UnimplementedView;

js/UnimplementedView.web.js

@@ -0,0 +1,39 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ * @format
+ */
+
+'use strict';
+
+import * as React from 'react';
+import {View, StyleSheet} from 'react-native';
+declare var __DEV__: boolean;
+/**
+ * Common implementation for a simple stubbed view. Simply applies the view's styles to the inner
+ * View component and renders its children.
+ */
+const UnimplementedView = (props: $FlowFixMeProps): React.Node => {
+  return (
+    <View style={[styles.unimplementedView, props.style]}>
+      {props.children}
+    </View>
+  );
+};
+
+const styles = StyleSheet.create({
+  unimplementedView:
+    process.env.NODE_ENV !== 'production'
+      ? {
+          alignSelf: 'flex-start',
+          borderColor: 'red',
+          borderWidth: 1,
+        }
+      : {},
+});
+
+export default UnimplementedView;