title: Try to convert json4s values into integers
body: <p>I have random JSON strings that contain string values when they are really numbers but I have no way to know what fields they might be when coming into my system.</p>
  
  <p>For example: </p>
  
  <pre><code>{
     "some_key":"1234",
     "another_key":{
        "sub_key":"4243",
        "a_string":"this is a valid string and should not be converted"
     }
  }
  </code></pre>
  
  <p>Does any one know of a simple way to try to convert json values into integers using json4s?</p>