Feature Request: Add underline format option for Paragraph block

[reginabally]

Requested in 6496087-zd-woothemes.

The Paragraph block on the web supports the underline format. It would be great if the app editor supports this format option.

[peril-wordpress-mobile]

	Fails
🚫	Please add a type label to this issue. e.g. '[Type] Enhancement'
🚫	Please add a feature label to this issue. e.g. 'Stats'

Generated by 🚫 dangerJS

[dangermattic]

Thanks for reporting! 👍

[jkmassel]

This is addressed by GutenbergKit. Closing.