tsconfig.json

{
  "compilerOptions": {
    "outDir": "./dist",        // path to output directory
    "baseUrl": ".",
    "paths": {
      "*": [
        "./src/types/*"
      ]
    },
    "sourceMap": true,          // allow sourcemap support
    "declaration": true,
    "strictNullChecks": true,   // enable strict null checks as a best practice
    "module": "commonjs",       // specifiy module code generation
    "target": "es5",            // specify ECMAScript target version
    "removeComments": false,
    "preserveConstEnums": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "suppressImplicitAnyIndexErrors": true,
    "moduleResolution": "node",
    "lib": [
      "es5",
      "es2015",
      "es2015.iterable",
      "es2015.collection",
      "es2015.promise",
      "es2016.array.include",
      "dom"
    ]
  },
  "include": [
    "./index.ts",
    "./src/**/*"
  ]
}