Merge pull request #30 from Kilian/patch-1

Author: timolins

site/pages/docs/toaster.mdx

@@ -40,6 +40,7 @@ You can change the defaults for a specific type by adding, `success: {}`, `error
   reverseOrder={false}
   toastOptions={{
     // Define default options
+    className: '',
     style: {
       margin: '40px',
       background: '#363636',