Version 5.0.0

Major

• Updated Node.js support to ^12.22.0 || ^14.17.0 || >= 16.0.0.
• Updated dev dependencies, some of which require newer Node.js versions than previously supported.
• Removed ./package from the package exports field; the full package.json filename must be used in a require path.
• Renamed index.mjs to disposableDirectory.mjs and added it to the package exports field.
• Implemented TypeScript types via JSDoc comments.

Patch

• Simplified package scripts.
• Check TypeScript types via a new package types script.
• Also run GitHub Actions CI with Node.js v17, and drop v15.
• Configured Prettier option singleQuote to the default, false.
• Reorganized the private and test files, individually listing published files in the the package files field.
• Renamed imports in the test index module.
• Documentation tweaks.