Add BenchmarkDotNet dependency to package mapping

Author: JoeRobich

NuGet.Config

@@ -18,6 +18,7 @@
             <package pattern="Cake.*" />
             <package pattern="DiffPlex" />
             <package pattern="Dotnet.Script.*" />
+            <package pattern="Gee.External.Capstone" />
             <package pattern="Humanizer.Core" />
             <package pattern="ICSharpCode.Decompiler" />
             <package pattern="McMaster.Extensions.CommandLineUtils" />