Dependency resolution should use same logic as dotnet restore

[coderpatros]

Just capturing this as a separate item to #15 and some of the discussion in #20.

In my experience the current logic resolves dependencies the same as a standard dotnet restore does. However there could be some corner cases where the behaviour is different.

To ensure dependency resolution is correct I think we should be using the standard nuget libraries as published from https://github.com/NuGet/NuGet.Client

[coderpatros]

In case anyone comes across this issue I am actively working on it.

[coderpatros]

I'm going to close this with a caveat, we should probably support --framework and --runtime parameters. Or alternatively/additionally the --no-restore option to give users more control. But I think new behaviour introduced in #42 should cover most requirements.