Cannot add target="_blank" attribute to <item> within <menu>

[antonydjames]

How can we reproduce this bug?

<menu><item href="http://www.address.com/" target="_blank"></item></menu>

What did you expect to happen?

The hyperlink within the 'item' component to contain the target="_blank" attribute, so that links clicked by users via a web email client are guaranteed to open in a new tab/window, no matter the client's default action. This doesn't need to apply by default, but ideally we should have the option to include it.

What happened instead?

The hyperlink does not include the target="_blank" attribute.

What email clients does this happen in?

All inlined HTML, ergo all web clients.

This is a similar issue to #432 though that applies to 'button' Inky elements rather than 'item' ones.

[rafibomb]

Looks like the PR that solves this for buttons can be easily extended to menu items - foundation/inky#42 Is that something you can help with?

[rafibomb]

Awesome PR by @ClementParis016 foundation/inky#54

[ClementParis016]

Thanks, I'm glad to contribute to this nice project :)