title: Request parameters from FullCalendar not received in Route
body: <p>Calendar and events work flawlessly except the request parameters <code>start</code> and <code>end</code> from fullcalendar are not received by the route. <code>$request</code> is completely empty. </p>
  
  <p>My calendar:</p>
  
  <pre><code>&lt;script&gt;
      document.addEventListener('DOMContentLoaded', function() {
          var FEED_URL = "{{url('/')}}" + "/event-feed";
          var calendarEl = document.getElementById('calendar');
          var calendar = new FullCalendar.Calendar(calendarEl, {
              plugins: [ 'dayGrid' ],
              events: {
                  url: FEED_URL
              }
          });
          calendar.render();
      });
  &lt;/script&gt;
  </code></pre>
  
  <p>My route:</p>
  
  <pre><code>use Carbon\Carbon;
  use Illuminate\Http\Request;
  use Illuminate\Support\Facades\Route;
  
  Route::get('/event-feed', function (Request $request) {
      $eventOutput = [
          [
              'id' =&gt; 1,
              'resourceId' =&gt; 'a',
              'title' =&gt; 'Test',
              'start' =&gt; '2020-06-11T00:00:00.000000Z',
              'end' =&gt; '2020-06-11T02:00:00.000000Z',
              'left' =&gt; $request-&gt;input('start'), //null
              'right' =&gt; $request-&gt;input('end'), //null
              'uri' =&gt; $request-&gt;path()
          ]
       ];
      return json_encode($eventOutput);
  });
  </code></pre>
  
  <p>The resulting feed is:</p>
  
  <pre><code>[{"id":1,"resourceId":"a","title":"Test","start":"2020-06-11T00:00:00.000000Z","end":"2020-06-11T02:00:00.000000Z","left":null,"right":null,"uri":"event-feed"}]
  </code></pre>
  
  <p>I also tried <code>php artisan serve</code> to see if its my Wamp server but the problem is the same. I also set up a vanilla Laravel 7 install and the problem is the same. Anyone has an idea where to look?</p>