title: Force URL::to('') to open in HTTPS instead of HTTP
body: <p>I'm using Laravel for the first time and my new client just switched to HTTPS.</p>
  
  <p>I'm finding a lot of mixed content errors in the console of his site due to files and images opening in HTTP instead of HTTPS.</p>
  
  <p>I checked his config/app.php and he already has:</p>
  
  <pre><code>'url' =&gt; 'https://www.Domain.co',
  </code></pre>
  
  <p>But when I check the code, where there is a mixed content error, there is a  <code>URL::to('')</code> which is rendering the domain without https.</p>
  
  <p>Any idea how I can fix it?</p>