tsconfig.json

{
    "compilerOptions": {
      "outDir": "dist",
      "declaration": true,
      "baseUrl": ".",
      "module": "esnext", 
      "target": "es5",
      "lib": ["es6", "dom"],
      "sourceMap": true,
      "jsx": "react",
      "moduleResolution": "node",
      "rootDir": ".",
      "forceConsistentCasingInFileNames": true,
      "noImplicitReturns": true,
      "noImplicitThis": true,
      "noImplicitAny": true,
      "importHelpers": true,
      "strictNullChecks": true,
      "suppressImplicitAnyIndexErrors": true,
      // https://github.com/Microsoft/TypeScript/issues/28762#issuecomment-443406607
      "allowSyntheticDefaultImports": true,
      "esModuleInterop": true,
      "noUnusedLocals": true
    },
    "include": [
        "types/**/*",
        "lib/**/*"
    ],
    "exclude": [
      "node_modules",
      "build",
      "dist",
      "scripts",
      "acceptance-tests",
      "webpack",
      "jest",
      "src/setupTests.ts",
      "*.js"
    ]
  }