title: Override placeholder value in third party input
body: <p>I'm using a third party tag-input and there's already a placeholder value. I would like to change the value of the placeholder. How would I do that? Right now it's "Enter a tag."</p>
  
  <pre><code>&lt;tag-input name="tags" [(ngModel)]='tags'&gt;&lt;/tag-input&gt;
  </code></pre>