message: fix(es/helpers): Fix `module` field in `package.json` of `@swc/helpers`
diff: "name": "@swc/helpers",
  "version": "0.4.0",
  "description": "External helpers for the swc project.",
  - "esnext": "src/index.js",
  - "module": "src/index.js",
  + "esnext": "src/index.mjs",
  + "module": "src/index.mjs",
  "main": "lib/index.js",
  "sideEffects": false,
  "scripts": {
  