Update code for React 19

Author: SergMitMin

.gitignore

@@ -4,6 +4,7 @@
 /node_modules
 /.pnp
 .pnp.js
+yarn.lock
 
 # testing
 /coverage

package.json

@@ -3,13 +3,13 @@
   "version": "1.0.0",
   "private": true,
   "dependencies": {
-    "@dhx/trial-scheduler": "^7.0.3",
+    "@dhx/trial-scheduler": "^7.2.3",
     "@testing-library/jest-dom": "^5.16.1",
     "@testing-library/react": "^12.1.2",
     "@testing-library/user-event": "^13.5.0",
-    "react": "^17.0.2",
-    "react-dom": "^17.0.2",
-    "react-scripts": "5.0.0"
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
+    "react-scripts": "5.0.1"
   },
   "scripts": {
     "start": "react-scripts start",

src/index.js

@@ -1,10 +1,13 @@
 import React from 'react';
-import ReactDOM from 'react-dom';
+import { createRoot } from 'react-dom/client';
 import './index.css';
 import App from './App';
 import * as serviceWorker from './serviceWorker';
 
-ReactDOM.render(<App />, document.getElementById('root'));
+const root = createRoot(document.getElementById("root"));
+
+root.render(<App />)
+
 
 // If you want your app to work offline and load faster, you can change
 // unregister() to register() below. Note this comes with some pitfalls.