tsconfig.json

{
  "compilerOptions": {
    "module": "commonjs",
    "target": "es6",
    "outDir": "out",
    "lib": [
      "es6",
      "es2017"
    ],
    // "declaration": false,
    // "declarationDir": "types",
    "sourceMap": true,
    "rootDir": "src",
    /* Strict Type-Checking Option */
    "strict": true, /* enable all strict type-checking options */
    /* Additional Checks */
    // "noUnusedLocals": true /* Report errors on unused locals. */,
    // "noImplicitReturns": true, /* Report error when not all code paths in function return a value. */
    // "noFallthroughCasesInSwitch": true, /* Report errors for fallthrough cases in switch statement. */
    // "noUnusedParameters": true,  /* Report errors on unused parameters. */
    "skipLibCheck": true /* Skip type checking of all declaration files */
  },
  "exclude": [
    "node_modules",
    ".vscode-test",
    "types",
    "out"
  ]
}