Trigger `reconnected()` callback after reconnects

[mansakondo]

Summary

The purpose is to allow subscribers to handle reconnects by defining a reconnected() callback:

import consumer from "./consumer"

consumer.subscriptions.create("ExampleChannel", {
  ...
  reconnected() {
   // Called when the subscription is confirmed after a reconnect
  },
});

That's useful if a subscriber misses some messages when the connection is lost.

[byroot]

Thanks!

[mansakondo]

Thanks!

Thanks @byroot for reviewing my first merged PR!

[p8]

Hi @mansakondo, I think this is missing an entry to the actioncable/CHANGELOG. Could you create a PR to add it?

[mansakondo]

Hi @mansakondo, I think this is missing an entry to the actioncable/CHANGELOG. Could you create a PR to add it?

Oh yeah, I forgot. Sure no problem.