9.0.0

Change

• a4987d7 Update @types/nlcst, unified, utilities, etc
  migrate: update too
• 252453a Change to require Node.js 16
  migrate: update too
• e719bf4 Change to use exports
  migrate: don’t use private APIs
• 67cef52 Remove parser exports
  migrate: get them from parse-english and similar

Misc

• b179ede Add retext-lexrank to list of plugins
  by @gorango in #82
• 44d6e7a Add retext-case-police to list of plugins
  by @JulianCataldo in #78

Full Changelog: 8.1.0...9.0.0