Improvement
- [CPP-4480] - Message::toXml() should return group instances as "GroupInstance" XML nodes
- [CPP-4478] - Add more details about ThreadPoolSize setting in the context of TCP listeners
- [CPP-4463] - Message::toJson() should return group instances as a JSON array of objects
Bug
- [CPP-4472] - SenderCompID and TargetCompID fields are missing in SequenceReset<4> message in FlatMessage mode
