Update to React 18

ReactDOM.render is no longer supported in React 18, switch to
createRoot.

package.json

@@ -16,9 +16,9 @@
     "budo": "^11.6.3",
     "bulma": "0.9",
     "prop-types": "^15.5.8",
-    "react": "^17.0.1",
+    "react": "^18.2.0",
     "react-collapsible": "^2.8.1",
-    "react-dom": "^17.0.1",
+    "react-dom": "^18.2.0",
     "terser": "^5.5.1"
   },
   "browserslist": "> 0.25%, not dead"

src/index.js

 'use strict';
 
 const React = require('react');
-const ReactDOM = require('react-dom');
+import { createRoot } from 'react-dom/client';
 
 const { App } = require('./App');
 
-ReactDOM.render(<App />, document.getElementById('root'));
+const container = document.getElementById('root');
+const root = createRoot(container);
+root.render(<App tab="home" />);