mjml 3.0.0 on Node.js Yarn

Features

mj-validator provides validation to MJML documents with 3 levels ( skip/soft/strict)
mj-include is now recursive, so you can use mj-include inside mj-include(related: https://i.imgflip.com/1beg53.jpg)
New tag mj-style can be used in mj-head to add CSS that will be inlined in the generated HTML. mj-style doesn't support media queries at the moment.
mj-fontnow enables users to override default MJML fonts like Roboto
mj-section now support the direction attribute to change the way columns display on desktop
mj-social now supports inner-padding to add padding between social networks
mj-button now supports the border-left/right/bottom/top and width attributes
mj-section now supports the border-left/right/bottom/top attributes
mj-column now supports the border-left/right/bottom/top attributes

mjml & mj-body is now mandatory, old MJML syntax with only mj-body is removed
mjml2html and MJMLRenderer will not return a string anymore, it will return an object with : { errors, html }

Fixed a bug when registering twice a MJML element with the same name
mj-button should now render correctly on old outlook ( 2000/2003)
Glob pattern ( *.mjml ) should now work in mjml-cli
When importing a MJML file using mj-include, the .mjml extension is optional
.mjmlconfig should now finally accepts relative path 🎉
Fixed the package.json version lockout to download a specific version
Fixed mj-group so it renders correctly on Outlook 2000/2003 & background-color works as expected