yarn add -D typescript @types/node
yarn add tslib
cat > ./tsconfig.json <<EOL
{
  "compilerOptions": {
    "pretty": true,
    "strict": true,
    "removeComments": true,
    "noImplicitReturns": true,
    "noImplicitAny": true,
    "noImplicitThis": true,
    "alwaysStrict": false,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,
    "forceConsistentCasingInFileNames": true,
    "diagnostics": true,
    "listEmittedFiles": true,
    "importHelpers": true,
    "noUnusedLocals": true,
    "esModuleInterop": true,
    "strictNullChecks": true,
    "experimentalDecorators": true,
    "isolatedModules": true,
    "skipLibCheck": true,
    "sourceMap": true,
    "resolveJsonModule": true,
    "declaration": true,
    "target": "es6",
    "module": "commonjs",
    "jsx": "preserve",
    "moduleResolution": "node",
    "outDir": "./build",
    "lib": ["es6", "es2015", "es2017", "esnext"],
    "typeRoots": [
      "./node_modules/@types"
    ],
    "types": [
      "node",
      "jest"
    ],
  },
  "include": ["./src"],
  "exclude": [
    "node_modules",
    "**/*.test.ts",
  ]
}
EOL
npx add-project-script -n "build" -v "tsc"