Popsicle User Agent Middleware

popsicle-user-agent is a specialized middleware designed for the Popsicle HTTP client library, facilitating the automatic setting of a `User-Agent` header for outgoing requests. Its current stable version is 1.0.0, an initial release that extracts this functionality from the Popsicle core. This signifies a modular approach to Popsicle's feature set, where specific concerns like user agent management are handled by dedicated packages. This package provides a simple, composable function, `userAgent()`, that can be seamlessly integrated into Popsicle's middleware chain. This allows developers to easily standardize the `User-Agent` string for all requests made through a specific Popsicle instance or a composed middleware stack. The primary differentiator is its tight integration within the Popsicle ecosystem, offering a lightweight and focused solution without introducing external dependencies beyond Popsicle itself and its peer dependency, Servie. Given its highly specific utility, the package is expected to maintain a stable API with infrequent, targeted releases, focusing on reliability rather than rapid feature expansion.