Update author email.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "deferred-lite",
-  "version": "0.2.0-pre",
+  "version": "0.2.0",
   "description": "Deferred pattern on top of Promise",
   "type": "module",
   "main": "src/deferred.js",