title: Lumen does not receive any file from Form Data that was sent
body: <p>I checked in chrome the Headers send for Form Data which looks something like this:</p>
  
  <p><a href="https://i.stack.imgur.com/19ACJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/19ACJ.png" alt="Chrome Headers Form Data"></a></p>
  
  <p>Now to be that looks like there is an image file named "files" in my POST request.</p>
  
  <p>Now in my Controller in Lumen I do the following debug to try get the file:</p>
  
  <pre><code>return response([$request-&gt;hasFile('files'), $request-&gt;file('files'), $request-&gt;get('files')]);
  </code></pre>
  
  <p>However what I get is this in the response:</p>
  
  <blockquote>
    <p>[true,{},null]</p>
  </blockquote>
  
  <p>This is the request I make in my react app:</p>
  
  <pre><code>const formData  = new FormData();
  formData.append("files", this.state.productData[key][0]);
  
          fetch(`${process.env.REACT_APP_API_URL}/products/submit`, {
              method: 'POST',
              body: formData,
          })
  </code></pre>
  
  <p>Does anyone know whats wrong with what I am doing to get the image?</p>