title: ngx-bootstrap carousel - how to modify indicators, improve accessibility
body: <p>I'm using <code>"ngx-bootstrap": "^3.1.3",</code> carousel component. I'd like to make my website more accessible for people with disabilities. Unfortunately I can't find a way to modify slide indicators so that they could be accessible using keyboard. Is there a way to do it?</p>
  
  <p>Here's what I got:</p>
  
  <pre><code>&lt;ol class="carousel-indicators ng-star-inserted"&gt;
      &lt;li class="ng-star-inserted"&gt;&lt;/li&gt;
      &lt;li class="ng-star-inserted active"&gt;&lt;/li&gt;
  &lt;/ol&gt;
  </code></pre>
  
  <p>And what I want:</p>
  
  <pre><code>&lt;ol class="carousel-indicators ng-star-inserted"&gt;
    &lt;li class="ng-star-inserted" tabindex="0" role="button" aria-pressed="false"&gt;&lt;/li&gt;
    &lt;li class="ng-star-inserted active" tabindex="0" role="button" aria-pressed="true"&gt;&lt;/li&gt;
  &lt;/ol&gt;
  </code></pre>