Build errors message when there was only a warning

[CristianHerrera]

It seems that some of the security vulnerabilities catch by SafeNuGet are being detected as build errors as shown in attached image, however when you check what is going on, you realize that the problem is a warning, a security vulnerability catch by SafeNuget. It would be good if the build errors message is not displayed cause it's a warning.

[eoftedal]

@CristianHerrera I just published version 1.0.9 where this option is available. See the README for how to configure