tsconfig.json

{
  "compileOnSave": true,
  "compilerOptions": {
    "lib": [
      "es2015",
      "dom"
    ],
    "outDir": "out",
    "declaration": true,
    "declarationDir": "out",
    "rootDir": "src"
  },
  "exclude": [
    "node_modules",
    "test",
    "out"
  ]
}