@jackfranklin/maths-package-for-blog-post/package.json

{
  "name": "@jackfranklin/maths-package-for-blog-post",
  "version": "0.1.0",
  "main": "./lib/cjs/index.js",
  "module": "./lib/esm/index.js",
  "files": [
    "lib/"
  ],
  "scripts": {
    "tsc": "tsc -p tsconfig.json && tsc -p tsconfig-cjs.json",
    "prepublishOnly": "npm run tsc"
  },
  "devDependencies": {
    "typescript": "^3.8.3"
  }
}