dasu: Consistent XHR API for Client and Server

dasu is a JavaScript library that aimed to provide a consistent XMLHttpRequest (XHR) API for both client-side (browser) and server-side (Node.js) environments. It abstracts away the underlying differences between `window.XMLHttpRequest` and Node's `http.request`, presenting a unified interface. The library, currently at version 0.4.3, was last published in June 2014. Its primary differentiator was simplifying basic HTTP requests with a single API across environments, which was particularly useful before the widespread adoption of Fetch API or more mature cross-platform libraries. Due to its age and lack of updates, it does not support modern JavaScript features like Promises or `async/await` and relies exclusively on CommonJS modules.