fix for loop for apple

src/Adapters/Auth/apple.js

@@ -9,7 +9,7 @@ function validateAuthData(authData, authOptions) {
     console.log("going to validate for apple");
     console.log(authData);
     var necessaries = ["timestamp", "salt", "id", "bundleId", "signature", "publicKeyUrl"];
-    for (var n in necessaries) {
+    for (var n of necessaries) {
         var necessary = necessaries[n];
         if (!(necessary in authData)) {
             error("Auth data does not have property " + necessary);