Version 4.0.0

Major

• Added a package exports field to support native ESM in Node.js.
• Added package sideEffects and module fields for bundlers such as webpack.
• Published files have been reorganized, so undocumented deep imports may no longer work.

Patch

• Updated dependencies.
• Lint fixes for prettier v2.
• Added esm and mjs to the package tags field.
• Ensure GitHub Actions run on pull request.
• Moved the simulatePublishedTraces test helper into its own file.
• Destructure assert imports in tests.
• Use file extensions in require paths.
• Tidied the position of a JSDoc comment.