MessageMLv2 support + production

[vincentmg]

Now that messageMLv2 is out, it would be great for you to take the HubSpot integration the full mile! What do you think?

Would be awesome to have this end up packaged and released along with the other integrations.

For that I imagine what would be needed would be:

• MesageMLv2 support
• Unit test coverage enhancements
• Use of FE-commons for the front end configurator app

[pmonks]

MessageMLv2 documentation:

• Structured Objects overall
• MessageML v2
• Formatting and styling
• Build a renderer

Also, the Zapier integration makes use of MessageMLv2 already, and may be a good resource to refer to.