add TypeScript typings

index.d.ts

@@ -0,0 +1,10 @@
+export = retargetEvents;
+
+ /**
+ * Fixes events for react components rendered in a `shadow dom`.
+ *
+ * When you render a react component inside `shadow dom` events will not be dispatched to react. I.e. when a user clicks in your react component nothing happens. This happens (or does not happen) with any events.
+ *
+ * A bug is filed at [#10422](https://github.com/facebook/react/issues/10422).
+ */
+declare function retargetEvents(shadowRoot: ShadowRoot): void;