9.0.0

Change

• b67d714 Change to require Node.js 16
  migrate: update too
• ec2b134 Change to require React 18
  migrate: update too
• bf5824f Change to use exports
  migrate: don’t use private APIs
• c383a45 Update @types/hast, utilities, plugins, etc
  migrate: update too
• eca5e6b 08ead9e Replace transformImageUri, transformLinkUri w/ urlTransform
  migrate: see Add urlTransform
• de29396 Remove linkTarget option
  by @galabra in #762
  migrate: see Remove linkTarget
• 4346276 Remove support for passing custom props to components
  migrate: see Remove includeElementIndex, Remove rawSourcePos, Remove sourcePos, Remove extra props passed to certain components
• c0dfbd6 Remove UMD bundle from package
  migrate: use esm.sh or a CDN or so
• e12b5e9 Remove prop-types
  migrate: use TypeScript
• 4eb7aa0 Change to throw errors for removed props
  migrate: don’t pass options that don’t do things
• 8aabf74 Change to improve error messages
  migrate: expect better messages

Full Changelog: 8.0.7...9.0.0