CSDK-189 added protocol_version to get node status response

[davidatwhiletrue]

Summary

Added ProtocolVersion to GetNodeResult class. This new property is added in https://github.com/casper-network/casper-node/pull/4787 (part of RC4)

TODO

Checklist

• [X] Code is properly formatted
• [X] All commits are signed
• [X] Tests included/updated or not needed
• [X] Documentation (manuals or wiki) has been updated or is not required