Bootstrap CSS class .align-self-*-stretch

<div class="align-self-stretch">Aligned flex item</div>

<!-- responsive variations -->
<div class="align-self-sm-stretch">Aligned flex item</div>
<div class="align-self-md-stretch">Aligned flex item</div>
<div class="align-self-lg-stretch">Aligned flex item</div>
<div class="align-self-xl-stretch">Aligned flex item</div>