tsconfig.json

{
  "compilerOptions": {
    "target": "es2016",
    "module": "commonjs",
    "outDir": "./build",
    "noImplicitAny": true,
    "removeComments": true,
    "noImplicitReturns": true,
    "alwaysStrict": true,
    "sourceMap": true
  },
  "exclude": [
    "node_modules"
  ]
}