grpc-node/packages/proto-loader/tsconfig.json

{
  "extends": "./node_modules/gts/tsconfig-google.json",
  "compilerOptions": {
    "rootDir": ".",
    "outDir": "build",
    "lib": ["es2017"],
    "target": "es2017"
  },
  "include": [
    "bin/**/*.ts",
    "src/**/*.ts",
    "test/**/*.ts"
  ]
}