Console.WriteLines in library

GitVersion received a PR updating to the latest libgit2sharp pre-release and our tests failed because libgit2sharp is writing to the console. https://github.com/GitTools/GitVersion/pull/1024

See https://github.com/libgit2/libgit2sharp/blob/500cc965dfb85806677c2c061e277e3a988b340a/LibGit2Sharp/Commands/Checkout.cs#L43

I assume this snuck in? 
