fix: add error listener

[hugocortes]

• Adds channel listeners and emits an error to Transporter on channel close or error
• Since channel connection is promise based, failed flag is added as a way to check if the connection failed.
  • Preferred approach would be to expose a Promise based connection establisher which creates the Transporter instance with promise result however this would need a refactor for all other extensions

example:

const instance = await extension
  .load(options)
  .then((client) => {
      return new extension(options, client)
  })
// additional Transporter config

Depends on myDevicesIoT/transporter#2