4.0.0

Change

• 16ffea7 Update @types/xast, utilities
  migrate: update too
• e0976d9 Change to require Node.js 16
  migrate: update too
• bda0adb Change to use exports
  migrate: don’t use private APIs

Type

• 6e5498f Add export of Raw node, register it

Full Changelog: 3.0.2...4.0.0