title: Laravel 5.6 get all rows as arrays of values using Eloquent ORM
body: <p>I have an eloquent query that returns a collection:</p>
  
  <pre><code>$items = Item::get(['id', 'name']);
  </code></pre>
  
  <p>When I convert to JSON I get this:</p>
  
  <pre><code>[
      {id: 1, name: "some name"},
      {id: 2, name: "some other name"}
  ]
  </code></pre>
  
  <p>I want a result like this instead:</p>
  
  <pre><code>[
      [1, "some name"],
      [2, "some other name"]
  ]
  </code></pre>
  
  <p>How can I achieve this with Laravel 5.6 and eloquent ORM?</p>