Utility Functions for Callback-based Async Iterators

This package provides utility functions like `forEach`, `map`, and `filter` for a specific, custom, callback-based asynchronous iterator pattern. In this library's context, an async iterator is defined as an object with a `next(cb)` method, where `cb` is a `function(err, value)` callback. The `next` method should return the next item from an underlying data source, calling `cb(null, undefined)` when no more data is available. Published in 2013, its current and only stable version is 0.2.2. The library targets legacy Node.js versions (>=0.10) and significantly predates the native ECMAScript `Symbol.asyncIterator` and `for-await-of` syntax, which were standardized in ES2018 and natively supported in Node.js 10.x. As it has seen no updates in over a decade, it is considered abandoned and fundamentally incompatible with modern asynchronous programming paradigms without extensive re-engineering or wrappers.