brightspace/ifrau

`ifrau` is a library that simplifies cross-domain communication between an IFRAME-based free-range app and its parent host using a promise-based API built on `postMessage`. It provides `Host`, `Client`, and `SlimClient` classes to enable easy event handling, request/response patterns, and service registration for versioning APIs. The library is designed for developers building free-range apps within the Brightspace platform, offering features like automatic resizing, font and language syncing, and plugin extensibility.