title: how to parse un Array of object with Circe
body: <p>I have a json</p>
  
  <p><code>
  {
    "field" : [
      {
        "value" : 1.0
      },
      {
        "value" : 2.0
      }
    ]
  }
  </code></p>
  
  <p>How do I get a <code>List[String]</code> that are of values List(1.0, 2.0) ?</p>