Update EachHelper.php

For arrays that contain only one element, `(array_keys($tmp) == range(0, count($tmp) - 1)` always returns true.

`(array_keys($tmp) === range(0, count($tmp) - 1)` works as expected.
Adding author data

Adding author data
Merge pull request #66 from jslegers/master

Fix for detecting assocc arrays with one item as list