Update readme

yash112-lang · web-flow · commit d2cb02017136 · 2021-06-20T14:20:07.000+05:30
diff --git a/toolbar-button/README.md b/toolbar-button/README.md
@@ -73,3 +73,8 @@ function activate(app: JupyterFrontEnd) {
   app.docRegistry.addWidgetExtension('Notebook', new ButtonExtension());
 };
 ```
+Finally exporting the plugin
+```ts
+// src/index.ts#L69-L69
+export default plugin;
+```
