tsconfig.json

{
  "compilerOptions": {
    "outDir": "dist",
    "module": "esnext",
    "target": "es6",
    "lib": ["es6", "dom", "es2016", "es2017"],
    "sourceMap": true,
    "allowJs": false,
    "jsx": "react",
    "declaration": true,
    "moduleResolution": "node",
    "forceConsistentCasingInFileNames": true,
    "noImplicitReturns": false,
    "noImplicitThis": true,
    "noImplicitAny": true,
    "strictNullChecks": true,
    "noUnusedParameters": true,
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true
  },
  "include": ["src", "__tests__/Marquee.test.js"],
  "exclude": ["node_modules", "dist", "example", "rollup.config.js"]
}