Handle closed socket connections
There seems to be a bug in the upstream API where, when the connection between Slack and Standup Steve gets broken (for example by a network failure), Standup Steve does not receive a "socket closed" event.
There seems to be a bug in the upstream API where, when the connection between Slack and Standup Steve gets broken (for example by a network failure), Standup Steve does not receive a "socket closed" event.