Koa Favicon Middleware

This middleware for Koa applications efficiently serves a `favicon.ico` file, handling requests for `/favicon.ico` and setting appropriate cache headers. Built upon the proven `serve-favicon` package, it provides a straightforward way to integrate favicon serving directly into the Koa middleware stack. The current stable version is 2.1.0, a mature release from the Koa organization. Its release cadence is generally slow, primarily responding to Koa framework updates or critical maintenance. It differentiates itself by its minimalistic API and direct compatibility with Koa's `app.use()` pattern, making it a standard choice for basic favicon serving in Koa projects. It supports custom `maxAge` caching and MIME type specification.