fix apple auth and update version to 2.8.5

package.json

@@ -1,6 +1,6 @@
 {
   "name": "parse-server",
-  "version": "2.8.4",
+  "version": "2.8.6",
   "description": "An express module providing a Parse-compatible API server",
   "main": "lib/index.js",
   "repository": {

src/Adapters/Auth/apple.js

@@ -9,7 +9,8 @@ function validateAuthData(authData, authOptions) {
     console.log("going to validate for apple");
     console.log(authData);
     var necessaries = ["timestamp", "salt", "id", "bundleId", "signature", "publicKeyUrl"];
-    for (var necessary in necessaries) {
+    for (var n in necessaries) {
+        var necessary = necessaries[n];
         if (!(necessary in authData)) {
             error("Auth data does not have property " + necessary);
         }