Test the new element <amp-delight-player>
Test the new element <amp-delight-player>

This was just added in the spec update,
so test that it's valid.
https://github.com/ampproject/amphtml/blob/fe4d16908df061955a5a5aa75f121794a61647da/extensions/amp-delight-player/amp-delight-player.md

ampproject/amp-toolbox-php,ampproject/amp-toolbox-php