tsconfig.json

{
  "compilerOptions": {
    /* Basic Options */
    "target": "es5", /* Specify ECMAScript target version. */
    "module": "ESNext", /* Specify module code generation. */
    "moduleResolution": "node",
    "lib": [
      "DOM",
			"DOM.Iterable",
      "es6"
    ],
    "declaration": true,
    "allowJs": true,
    /* Strict Type-Checking Options */
    "strict": true,
    /* Additional Checks */
    // "noUnusedLocals": true, /* Report errors on unused locals. */
    "allowSyntheticDefaultImports": true,
    "preserveConstEnums": true,
    "noUnusedParameters": true, /* Report errors on unused parameters. */
    "noImplicitReturns": true, /* Report error when not all code paths in function return a value. */
    "noFallthroughCasesInSwitch": true, /* Report errors for fallthrough cases in switch statement. */
    "outDir": "./__lib/",
    "types": [
      "node"
    ]
  },
  "include": [
    "./src/**/*",
  ],
  "exclude": [
    "./src/**/__tests__/*",
  ],
  /* Module Resolution Options */
  /* Advanced Options */
  "pretty": true,
}