MJML support

[thormeier]

Hello!

First of all, thank you for your work on this library!

Has MJML (https://github.com/mjmlio/mjml) support been considered for this library? The use case would be to use, for example, VueJS to render email templates. I'd be happy to contribute starting mid-August.

[jonock]

Hey!
That'd be a very good addition. I would be interested in this use-case as well.