tools/node_tools/polygerrit_app_preprocessor/tsconfig.json

{
  "compilerOptions": {
    "target": "es2019", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
    "module": "es2015", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    "strict": true,
    "moduleResolution": "node",
    "outDir": "out"
  },
  "include": ["*.ts"]
}