disconnect! should also ensure the connection is closed after sending close event.

ioquatix · ioquatix · commit 418a6455cc73 · 2019-04-07T09:42:00.000+12:00
diff --git a/lib/slack/real_time/socket.rb b/lib/slack/real_time/socket.rb
@@ -40,6 +40,7 @@ def connect!
 
       def disconnect!
         @driver.close
+        self.close
       end
 
       def connected?
