tsconfig.json

{
  "compilerOptions": {
    "alwaysStrict": true,
    "declaration": true,
    "lib": ["dom", "es5", "es2015.core", "es2015.iterable", "es2015.promise"],
    "listFiles": false,
    "module": "commonjs",
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "outDir": "dist",
    "pretty": true,
    "strictNullChecks": true,
    "stripInternal": true,
    "suppressImplicitAnyIndexErrors": true,
    "target": "es5",
    "esModuleInterop": true
  },
  "exclude": ["index.d.ts", "dist", "node_modules", "tests/*.d.ts"]
}