mjml 4.8.0 on Node.js NPM

Features

A new package mjml-browser is available. Use this package if you need to use MJML client-side.
Add align attribute to mj-divider (thanks @thierrylemoulec)
Supports returning siblings elements from a custom component (thanks @IanEdington)
Move js-beautify and html-minifier to cli, and flag minify and beautify options as deprecated in mjml-core. They will be removed from the core and only available in cli in MJML 5. (thanks @TrySound)
Flag mjml-migrate as deprecated. It will be removed in MJML 5. (thanks @TrySound)
Transpile lib for node 10 (thanks @TrySound)
Refacto mjml-validator (thanks @TrySound)
Bump all dependencies (thanks @DRoet)

Fix mjml-spacer in outlook, height was ignored when it was the last element of its parent mj-column (fixes #1971, thanks @Pharmasolin)
Fix independent border properties on mj-image (fixes #1939, thanks @Pharmasolin)
Fix conditional comment for meta tag in skeleton (thanks @cheapsteak)
Added missing <tbody> after <table> tag in mj-column component. (thanks @Pharmasolin)
Add @babel/runtime dependency directly to mjml (thanks @doits)
Fix issue with stacking columns within mj-group in Gmail for IOS (thanks @jsteele883)
Handle border-radius on mj-hero (thanks @vasin)
Documentation fixes and additions (thanks @theoomoregbee, @GarryFlemings, @KonstantinLukaschenko)