Changing the ConnectionStateListener interface?

[Christofer Dutz]

Hi all and particularly @Łukasz 
Dywicki<https://the-asf.slack.com/team/UCG0T0YBA> …

I just stumbled over the problem, that I'm using an ADS connection in a tool 
and the driver correctly picks up that I updated the tags, but there is no way 
for the driver to tell the client about this ... so I wanted to add a 
ConnectionStateListener and saw you already added one ... however one that's 
fixed to connect and disconnect .... I would like to update this to this:

// org.apache.plc4x.java.api.listener.PlcConnectionStateListener
  public interface PlcConnectionStateListener {
      void onConnectionStateChanged(PlcConnectionStateChangedEvent event);
  }

  // org.apache.plc4x.java.api.listener.event.PlcConnectionStateChangedEvent
  public class PlcConnectionStateChangedEvent {
      public enum ChangeType {
          TAGS_CHANGED,
          MODE_RUN,
          MODE_STOP,
          MODE_CONFIG
      }
      private final ChangeType changeType;
      private final String details;
      // constructor, getters
}

Any objections?

Chris