Using bad url doesn't throw error.

[coolaj86]

Describe the bug

When using a bad URL I would expect a failure, but instead nothing happens.

Reproducing

npm install --save zeromq@5

  //  note the invalid `.1041`
  var zmqUrl = 'tcp://10.0.0.1041:28332';

  var zmq = require('zeromq');
  var zmqSubSocket = zmq.socket('sub');

  zmqSubSocket.on('connect', function(fd, endPoint) {
    console.info('ZMQ connected to:', endPoint);
  });

  zmqSubSocket.on('connect_delay', function(fd, endPoint) {
    console.warn('ZMQ connection delay:', endPoint);
  });

  zmqSubSocket.on('disconnect', function(fd, endPoint) {
    console.warn('ZMQ disconnect:', endPoint);
  });

  zmqSubSocket.on('monitor_error', function(err) {
    console.error('Error in monitoring: %s, will restart monitoring in 5 seconds', err);
  });

  zmqSubSocket.monitor(500, 0);
  zmqSubSocket.connect(zmqUrl);

node ./test.js

# just sits there and hangs

Expected behavior

An error should be thrown.

Tested on

• OS: Ubuntu 22.04 LTS
• ZeroMQ.js version: 5.3.1