title: "requests-html" proxy setting not working
body: <p>I'm using the following code to set the proxy for the <code>HTMLSession</code>, <code>get()</code> method. Still, it uses my IP instead of the proxy IP.</p>
  <p>proxy string format:</p>
  <pre class="lang-py prettyprint-override"><code>http://username:password@ip:port
  
  r = session.get('https://whatismyipaddress.com/', proxies={'http': proxy})
  r.html.find('p.ip-address')[0].text
  </code></pre>
  <p>above print the following which is my current IP address.</p>
  <pre><code>'IPv4:? The most common IP version is assigned by ISPs. 175.157.?.?'
  </code></pre>