Convert DevMenu to use exports syntax (#49491)

Summary:
Pull Request resolved: #49491

Changelog: [General][Breaking] Deep imports to modules inside `Libraries/DevMenu` using `require` may need to be appended with `.default`

Reviewed By: cortinico

Differential Revision: D69778671

fbshipit-source-id: 19362fbb003e53609881fc19e8d2cb96677b3006

Author: j-piasecki

packages/react-native/index.js

@@ -177,7 +177,7 @@ module.exports = {
     return require('./Libraries/Utilities/DeviceInfo').default;
   },
   get DevMenu() {
-    return require('./src/private/devmenu/DevMenu');
+    return require('./src/private/devmenu/DevMenu').default;
   },
   get DevSettings() {
     return require('./Libraries/Utilities/DevSettings').default;

packages/react-native/src/private/devmenu/DevMenu.js

@@ -28,4 +28,4 @@ const DevMenu: DevMenuStatic = {
   },
 };
 
-module.exports = DevMenu;
+export default DevMenu;