✨ (new version) display button if there is a new version.

src/bus/noteEventBus.ts

@@ -0,0 +1,10 @@
+import { createEventBus } from 'retrobus'
+
+interface EventBusParams {
+  user: string
+  repo: string
+  path: string
+  currentNoteSHA?: string
+}
+
+export const noteEventBus = createEventBus<EventBusParams>('note')