Correct check for array fixes marcj#21

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray

Author: KyleAMathews

src/ResizeSensor.js

@@ -128,7 +128,7 @@
             });
         }
 
-        if ('array' === typeof element
+        if ("[object Array]" === Object.prototype.toString.call(element)
             || ('undefined' !== typeof jQuery && element instanceof jQuery) //jquery
             || ('undefined' !== typeof Elements && element instanceof Elements) //mootools
             ) {
@@ -141,4 +141,4 @@
         }
     }
 
-})();
+})();