Allow web-share attribute on the iframe

[alykat]

More info here:
https://developer.chrome.com/blog/web-share-api-in-third-party-iframes/

Otherwise, attempts to use the Web Share API (as for the diploma at the end of the Planet Money Summer School quiz) are blocked.

This might be a matter of adding it to the allowed iframe parameters: https://blog.apps.npr.org/pym.js/api/pym.js/1.3.2/module-pym.Parent.html

as described here in the documentation: https://blog.apps.npr.org/pym.js/#auto

[thomaswilburn]

Of course, you know what supports the allow attribute directly...

(Once it's republished to npm, that is, or you could install from @civicnews/sidechain which is up to date.)