title: Elastic Search sort numbers in string
body: <p>In elastic search I am using <code>sort</code> to sort by first line of address. However where the address begins with a number it is sorted as:</p>
  
  <pre><code>1 Some Street
  10 Some Street
  12 Some Street
  2 Some Street
  22 Some Street
  24 Some Street
  </code></pre>
  
  <p>I would prefer to order it as 1, 2, 10, 12, 22, 24 etc.</p>
  
  <p>Sort code below in php:</p>
  
  <pre><code>$params['sort'] = array('line_1:asc');
  </code></pre>