Common.Logging.NLog4xx through a warning when used in .NET standard 2.0 project

When adding a reference to Common.Logging.NLog4xx NuGet inside a .NET standard project, you get the following warning: 

```
Package 'Common.Logging.NLog444 3.4.1' was restored using '.NETFramework,Version=v4.6.1' instead of the project target framework '.NETStandard,Version=v2.0'. This package may not be fully compatible with your project.
```

Any ways to avoid this? 
