Is there a way to support `.mjml.erb` files vs `.mjml`?

[marcelolx]

We have been happily using this gem, but we have been wondering if it could be possible for our mailer views to have the .mjml.erb extension versus just .mjml?

When the mailer view has the .mjml extension, it is rendered as expected, but when it is .mjml.erb it is not compiling the mjml markup

Or should it already work, and we are doing something wrong?