Test DEWP's excludedExternals using react

instead of lodash.
Avoid warnings and prepare for dropping lodash completely.

Addresses https://github.com/WordPress/gutenberg/pull/45948/files/e0d164967659fea61f769f876aa0c63010fbda62#r1262670308

packages/dependency-extraction-webpack-plugin/test/__snapshots__/build.js.snap

@@ -1,15 +1,20 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`DependencyExtractionWebpackPlugin Webpack \`bundled-packages\` should produce expected output: Asset file 'index.min.asset.php' should match snapshot 1`] = `
-"<?php return array('dependencies' => array('wp-blob'), 'version' => 'e46beb725c995b0c555a');
+"<?php return array('dependencies' => array('react', 'wp-blob'), 'version' => '8df4ae5a12b83b01dbc3');
 "
 `;
 
 exports[`DependencyExtractionWebpackPlugin Webpack \`bundled-packages\` should produce expected output: External modules should match snapshot 1`] = `
-Array [
-  Object {
+[
+  {
+    "externalType": "window",
+    "request": "React",
+    "userRequest": "react",
+  },
+  {
     "externalType": "window",
-    "request": Array [
+    "request": [
       "wp",
       "blob",
     ],

packages/dependency-extraction-webpack-plugin/test/fixtures/bundled-packages/index.js

@@ -1,11 +1,11 @@
 /**
  * External dependencies
  */
-import { isEmpty } from 'lodash';
+import { ReactDOM } from 'react-dom';
 
 /**
  * WordPress dependencies
  */
 import { isBlobURL } from '@wordpress/blob';
 
-isEmpty( isBlobURL( '' ) );
+isBlobURL( ReactDOM.version );

packages/dependency-extraction-webpack-plugin/test/fixtures/bundled-packages/webpack.config.js

@@ -9,7 +9,7 @@ module.exports = {
 	},
 	plugins: [
 		new DependencyExtractionWebpackPlugin( {
-			excludedExternals: [ 'lodash' ],
+			excludedExternals: [ 'react-dom' ],
 		} ),
 	],
 };