How will this patch change for people installing Twisted on Windows?
Twisted is still used by a lot of users on Windows, and the IOCP Reactor is
still used on this platform.
This line is what does the trick:
Basically, on Windows, you'll automatically get the `twisted-iocpsupport` module as a hard dependency. On other platforms, you won't. Unless you're using a truly ancient `pip` (which is less likely on Windows, where people tend to install things themselves rather than getting them from a calcified platfom) this will just work ✨ magically