title: Toastr "options" don't work
body: <p>I create notification message using Toastr. My notification message is shows, but I can't use any options, I put some options but they don't work.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>$('#editButton').click(function() {
    toastr.success('System successfully saved');
    toastr.options.timeOut = 5000;
    toastr.options.positionClass = toast - top - center;
  });</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/toastr.js/latest/js/toastr.min.js"&gt;&lt;/script&gt;
  &lt;link href="//cdnjs.cloudflare.com/ajax/libs/toastr.js/latest/css/toastr.min.css" rel="stylesheet"&gt;
  
  &lt;button class="button" id="editButton" type="submit" aria-hidden="true"&gt;Edit&lt;/button&gt;</code></pre>
  </div>
  </div>
  </p>