Converts DraggableEvent to typescript

Author: tsov

.changeset/young-drinks-call.md

@@ -0,0 +1,5 @@
+---
+'@shopify/draggable': patch
+---
+
+Converts DraggableEvent to typescript

src/Draggable/DraggableEvent/DraggableEvent.js renamed to src/Draggable/DraggableEvent/DraggableEvent.ts

@@ -1,12 +1,21 @@
 import AbstractEvent from 'shared/AbstractEvent';
+import {FixMeAny} from 'shared/types';
+
+/**
+ * DraggableEventData
+ * @interface DraggableEventData
+ */
+interface DraggableEventData {
+  draggable: FixMeAny;
+}
 
 /**
  * Base draggable event
  * @class DraggableEvent
  * @module DraggableEvent
  * @extends AbstractEvent
  */
-export class DraggableEvent extends AbstractEvent {
+export class DraggableEvent extends AbstractEvent<DraggableEventData> {
   static type = 'draggable';
 
   /**