setup-php/tsconfig.json

{
  "compilerOptions": {
    "declaration": true,
    "esModuleInterop": true,
    "lib": [
      "ES2020"
    ],
    "module": "commonjs",
    "moduleResolution": "node",
    "noImplicitAny": true,
    "outDir": "./lib",
    "removeComments": true,
    "rootDir": "./src",
    "sourceMap": true,
    "strict": true,
    "target": "ES2019"
  },
  "exclude": ["__tests__", "lib", "node_modules"]
}