tsconfig.json

{
  "compilerOptions": {
    "moduleResolution": "node",
    "module": "commonjs",
    "target": "es5",
    "declaration": true,
    "sourceMap": true,
    "outDir": "lib",
    "declarationMap": true,
    "declarationDir": "lib",
    "downlevelIteration": true,
    "strict": true,
    "noImplicitAny": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictBindCallApply": true,
    "strictPropertyInitialization": true,
    "noImplicitThis": true,
    "alwaysStrict": true,
    "noUnusedLocals": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "allowSyntheticDefaultImports": true,
    "experimentalDecorators": true,
    "skipLibCheck": true,
    "noEmitHelpers": true,
    "importHelpers": true,
    "lib": [
      "dom",
      "es2015"
    ]
  },
  "include": [
    "./src/**/*"
  ],
  "exclude": [
    "lib",
    "node_modules"
  ]
}