tsconfig.json

{
  "compilerOptions": {
    "strict": true,
    "outDir": "./dist",
    "target": "es2018",
    "module": "commonjs",
    "moduleResolution": "node",
    "allowSyntheticDefaultImports": true,
    "preserveConstEnums": true,
    "forceConsistentCasingInFileNames": true,
    "importHelpers": false,
    "esModuleInterop": true,
    "declaration": true,
    "jsx": "react-jsx",
    "baseUrl": ".",
    "noImplicitAny": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,
    "noImplicitThis": true,
    "alwaysStrict": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "resolveJsonModule": true,
    "importsNotUsedAsValues": "error"
  },
  "include": ["src"],
  "exclude": ["src/stories"]
}