upend/tools/upend_js/tsconfig.json

{
  "compilerOptions": {
    "target": "es5",
    "lib": ["es2019", "DOM"],
    "module": "commonjs",
    "importsNotUsedAsValues": "error",
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "strict": true
  }
}