[0.0.2] Set SubscribabelEvent class as the default export

package.json

@@ -1,6 +1,6 @@
 {
   "name": "subscribableevent",
-  "version": "0.0.1",
+  "version": "0.0.2",
   "description": "A simple strongly-typed pub/sub/fire eventing system",
   "author": "ReactXP Team <reactxp@microsoft.com>",
   "license": "MIT",

src/SubscribableEvent.ts

@@ -20,7 +20,7 @@ export class SubscriptionToken {
     }
 }
 
-export class SubscribableEvent<F extends { (...args: any[]): boolean|void }> {
+export default class SubscribableEvent<F extends { (...args: any[]): boolean|void }> {
     private _subscribers: Function[];
 
     constructor() {