Jest hangs on default socket

[flaviut]

Hey, I ran into Jest hanging for me due to the import-time construction of the socket. I would suggest removing the default socket functionality from this software & requiring the user initialize & manage the lifecycle of their own objects.

In the meanwhile, I've worked around this in two ways. I've changed my import to be conditional:

const transport =
  process.ppid === 1
    ? require("@app/utils/systemd-log-transport").default()
    : pino.destination(process.stdout.fd);

and I've added a jest globalTeardown script to trigger the closing of this socket:

module.exports = () => {
  // required to close the systemd-log-transport if it is used
  process.emit("beforeExit");
};

I appreciate your work on this project, it's been very helpful!