Lodash isUndefined Function

This package, `lodash.isundefined` (version 3.0.1), provides the `_.isUndefined` utility function from the Lodash library as a standalone Node.js CommonJS module. It is designed to check if a value is strictly `undefined`, returning `true` for `undefined` and `false` for all other values, including `null`. While the main Lodash library is actively maintained and currently at version 4.18.x with frequent releases, this specific modular package has not been updated since its 3.0.1 release, aligning with Lodash v3.x. Its key differentiator was providing a lightweight option compared to importing the entire Lodash library, but modern bundlers often make `lodash-es` (or direct `lodash` imports with tree-shaking) a more efficient alternative for specific functions.