tsconfig.json

{
  "compilerOptions": {
    // Target latest version of ECMAScript.
    "target": "esnext",
    // Search under node_modules for non-relative imports.
    "moduleResolution": "node",
    // Process & infer types from .js files.
    "allowJs": false,
    // Don't emit; allow Babel to transform files.
    "noEmit": true,
    // Enable strictest settings like strictNullChecks & noImplicitAny.
    "strict": true,
    // Disallow features that require cross-file information for emit.
    "isolatedModules": true,
    // Import non-ES modules as default imports.
    "esModuleInterop": true,
    // Allow default imports from modules with no default export. This does not affect code emit, just typechecking.
    "allowSyntheticDefaultImports": true,
    "jsx": "react-native",
    "sourceMap": true,
    "noImplicitReturns": true,
    "skipLibCheck": true,
    "typeRoots": ["./src/typings", "node_modules/@types"],
    "lib": ["es7"]
  },
  "exclude": ["node_modules"],
  "include": ["src/**/*"]
}