tsconfig.json

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": ".",
    "outDir": "./dist",
    "sourceMap": true,
    "declaration": true,
    "downlevelIteration": true,
    "module": "amd",
    "moduleResolution": "node",
    "importHelpers": true,
    "target": "es2015",
    "lib": [
      "es2018",
      "dom"
    ]
  },
  "include": [
    "src/**/*.ts"
  ]
}