This has been used as-is in multiple production apps. I think it's ready for an official release.
I'm not committing to a v1.0 just yet so breaking changes will still occur until that milestone is hit. Until then, make sure to lock your dependency to the next minor version, like so:
.package(url: "https://github.com/joemasilotti/HTTP-Client", .upToNextMinor(from: "0.1"))