typo fix for native Promise implementation

forEachAsync.js

@@ -65,7 +65,7 @@
   try { 
    exp.forEachAsync = create(require('bluebird'));
   } catch(e) {
-    if ('undefined' !== typeof PromiseA) {
+    if ('undefined' !== typeof Promise) {
       exp.forEachAsync = create(Promise);
     } else {
       try { 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "foreachasync",
-  "version": "5.0.2",
+  "version": "5.0.3",
   "description": "A node- and browser-ready async (now with promises) counterpart of Array.prototype.forEach",
   "homepage": "https://github.com/FuturesJS/forEachAsync",
   "main": "forEachAsync.js",