tsconfig.json

{
  "compilerOptions": {
    "allowSyntheticDefaultImports": true,
    "composite": true,
    "declaration": true,
    "declarationMap": true,
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "jsx": "react-jsx",
    "lib": ["es2015", "es5", "dom"],
    "module": "commonjs",
    "moduleResolution": "node",
    "noEmitOnError": true,
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noUnusedLocals": true,
    "outDir": "dist",
    "preserveSymlinks": true,
    "preserveWatchOutput": true,
    "pretty": false,
    "rootDir": "src",
    "sourceMap": true,
    "strictNullChecks": true,
    "target": "es5",
    "types": ["node"]
  },
  "exclude": ["node_modules", "dist", "src/stories"],
  "include": ["src"]
}