To pack the SharpXMPP and publish it to NuGet, use the following command:
$ rm -r SharpXMPP.Shared/bin/Release
$ dotnet pack -c Release SharpXMPP.Shared
$ dotnet nuget push SharpXMPP.Shared/bin/Release/SharpXMPP.<version>.nupkg -k <NuGet API key> -s https://www.nuget.org/api/v2/package