Missing wsport field of getversion RPC structure on RPC client side

[AnnaShaleva]

Describe the bug
#859 removed WsPort property from RpcVersion class on the RPC client side. We need to get it back, because NeoGo RPC server still supports WS capability and NeoC# RPC client is capable of interacting with both C# and Go nodes. It's OK not to have this field on the NeoC# RPC server side since WS server was removed form the C# node.

Expected behavior
NeoC# RPC client should be able to properly unmarshal wsport field of the response to getversion RPC call.

Platform:

• Version: RpcClient v3.6.3

[Jim8y]

Unless C# adds ws support, otherwise Wsport will not be add back.

[roman-khimov]

What's the behavior now? The client will fail unmarshaling the response? Same thing can happen with new client accessing old server, please be careful.