Create a css class for Image field in Views

In Views, when adding an image field there's no way I can add a css class to the image tag. For example, if I were to shape the image to a circle using bootstrap I have to add a .rounded-circle class to the image and I couldn't find a way to do it. So I think it's conveninent and important to have such function added to the views.

<img src="cinqueterre.jpg" class="rounded-circle" alt="Cinque Terre">

Here just a sample I imagine how it would look like or something similar. Please consider. Thanks!

image field create css class in views

GitHub Issue #: 
2920