tsconfig.json

{
  "compilerOptions": {
    "module": "CommonJS",
    "target": "ES2018",
    "moduleResolution": "node",
    "allowSyntheticDefaultImports": true,
    "experimentalDecorators": false,
    "emitDecoratorMetadata": false,
    "resolveJsonModule": true,
    "esModuleInterop": true,
    "removeComments": true,
    "noImplicitAny": true,
    "noUnusedLocals": false,
    "pretty": true,
    "strict": true,
    "allowJs": true,
    "checkJs": false,
    "sourceMap": false,
    "noEmitOnError": true,
    "downlevelIteration": true,
    "declaration": true,
    "declarationDir": "./types",
    "declarationMap": false,
    "skipLibCheck": true,
    "baseUrl": "./src",
    "outDir": "./lib",
    "lib": [
      "esnext",
      "scripthost",
      "es5",
      "es2015",
      "es2015.promise",
      "es2017",
      "es2017.object",
      "es7"
    ],
    "types": ["node"]
  },
  "include": ["./src/**/*.ts"]
}