tsconfig.json

{
  "compilerOptions": {
    "allowUnreachableCode": false,
    "allowUnusedLabels": false,
    "baseUrl": ".",
    "declaration": true,
    "lib": [
      "es2015",
      "dom"
    ],
    "module": "commonjs",
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "outDir": "./lib",
    "removeComments": true,
    "sourceMap": true,
    "strict": true,
    "target": "es5"
  },
  "include": ["./src/**/*"],
  "exclude": ["node_modules", "lib", "src/__tests__/**/*"]
}