message: Add `"type": "module"` to `package.json`
diff: "description": "A Web Audio framework for making interactive music in the browser.",
  "main": "build/Tone.js",
  "module": "build/esm/index.js",
  + "type": "module",
  "types": "build/esm/index.d.ts",
  "files": [
  "README.md",
  