fixed creating two connections instead of one cause close event handl…

[GinkoGintoki]

fixed bug where close event handler emitting after error handler and because of this creates two channels. Here amqplib reference docs: https://amqp-node.github.io/amqplib/channel_api.html#model_events

[dtes]

Hi @BDav24! Please, would you merge this pull request. The bug leads to a connection leak and connection limit.

[BDav24]

Sorry for the delay I didn't get the notifications.

I think you can achieve the same in the reconnect method:

  async reconnect () {
    if (this.connecting) return

    this.connecting = true