tsconfig.json

{
  "include": [
    "src/**.ts"
   ],
   "exclude": [
    "node_modules", "test/**.ts"
   ],
  "compilerOptions": {
    "lib": [
     "es2017","es2015","dom","es6"
    ],
    "outDir": "build",
    "types":["node"],
    "target": "es2015",
    "module": "commonjs",
    "declaration": true,
    "strict": false,
    "esModuleInterop": true,
    "experimentalDecorators":true,
    "skipLibCheck": true
  }
}