Set the format for Heroku Addresses

We've added a new option to the Heroku addon to allow you to set the format for the address as you provision it.

The options are:

• json - JSON format (Normalized)
• multipart - Multipart format (Normalized)

Don't forget you can also set the target URL too using the target option.

heroku addons:create cloudmailin -- --format json --target https://example.com/emails