tsconfig.json

{
    "compilerOptions": {
        // Target latest version of ECMAScript.
        "target": "esnext",
        "module": "commonjs",
        // Search under node_modules for non-relative imports.
        "moduleResolution": "node",
        // Process & infer types from .js files.
        "allowJs": true,
        // Don't emit; allow Babel to transform files.
        "noEmit": true,
        // Enable strictest settings like strictNullChecks & noImplicitAny.
        "strict": false,
        // Disallow features that require cross-file information for emit.
        "isolatedModules": true,
        // Import non-ES modules as default imports.
        "esModuleInterop": true,
        "noUnusedLocals": true,
        "strictNullChecks": true,
        "preserveConstEnums": true,
        "noFallthroughCasesInSwitch": true,
        "allowSyntheticDefaultImports": true,
        "forceConsistentCasingInFileNames": true,
        "skipLibCheck": true,
        "lib": ["DOM", "ESNext", "DOM.Iterable"]
    },
    "include": ["packages/@ackee/*/src"],
    "typeAcquisition": {
        "include": ["jest"]
    }
}