Version 1.7.1

Fix: Proxy generating exception on non-generic method.
Update to support netcore 3 and netstandard 2.1.
Update Roslyn to 3.3.1 for C# 8 and netcore3/netstandard 2.1 support.

Remote Agency: 1.7.1

Remote Agency Base: 1.7.1

DataContract Serializer: 1.7.1

DataContract Serializer Easy Encapsulation: 1.7.1