tsconfig.json

{
  "compilerOptions": {
    "preserveWatchOutput": true,

    "rootDir": "src",
    "outDir": "dist",
    "declaration": true,
    "declarationDir": "./dist",
    "allowJs": false,
    "sourceMap": true,
    "inlineSourceMap": false,

    "target": "es2017",
    "module": "commonjs",
    "lib": ["es2017", "esnext.asynciterable"],
    "esModuleInterop": true,

    "pretty": true,
    "removeComments": false,
    "preserveConstEnums": true,

    "moduleResolution": "node",
    "resolveJsonModule": true,
    "importHelpers": true,

    "strict": true,
    "suppressImplicitAnyIndexErrors": true,

    "noFallthroughCasesInSwitch": false,
    "noUnusedParameters": false,
    "noUnusedLocals": false
  },
  "include": ["src/**/*.ts"],
  "exclude": ["node_modules", "dist", "__tests__", "**/__tests__"]
}