.tsconfig.json

{
  "compilerOptions": {
    "allowSyntheticDefaultImports": true,
    "noFallthroughCasesInSwitch": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "esModuleInterop": true,
    "noUnusedLocals": true,
    "noImplicitAny": true,
    "declarationDir": "dist/types",
    "declaration": true,
    "target": "ESNext",
    "module": "es2015",
    "strict": true
  },
  "include": ["src/**/*"],
  "exclude": ["node_modules", "dist"]
}