ethers.js/packages/testcases/tsconfig.json

{
  "extends": "../../tsconfig.package.json",
  "compilerOptions": {
    "rootDir": "./src.ts",
    "outDir": "./lib/",
    "resolveJsonModule": true
  },
  "include": [
    "./thirdparty.d.ts",
    "./src.ts/*.ts",
    "./src.ts/*.json"
  ],
  "exclude": [
    "./src.ts/generation-scripts/*"
  ]
}