Revert "net: remove unnecessary process.nextTick()"

This reverts commit 571882c5.

Removing the process.nextTick() call can prevent the consumer
from being able to catch error events.

PR-URL: https://github.com/nodejs/node/pull/12854
Fixes: https://github.com/nodejs/node/issues/12841


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>