arrays shouldn't be treated as an iterable

Author: danielkcz

src/react/JSONTree/obj-type.js

@@ -1,5 +1,7 @@
 export default function(obj) {
-  if (obj !== null && typeof obj === 'object' && typeof obj[Symbol.iterator] === 'function') {
+  if (obj !== null && typeof obj === 'object' && !Array.isArray(obj) &&
+    typeof obj[Symbol.iterator] === 'function'
+  ) {
     return 'Iterable';
   }
   return Object.prototype.toString.call(obj).slice(8, -1);