Update dependencies from https://github.com/dotnet/arcade build 20200308.2

Update dependencies from https://github.com/dotnet/arcade build 20200308.2

- Microsoft.DotNet.XUnitExtensions - 5.0.0-beta.20158.2
- Microsoft.DotNet.VersionTools.Tasks - 5.0.0-beta.20158.2
- Microsoft.DotNet.ApiCompat - 5.0.0-beta.20158.2
- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.20158.2
- Microsoft.DotNet.Build.Tasks.Feed - 5.0.0-beta.20158.2
- Microsoft.DotNet.Build.Tasks.Packaging - 5.0.0-beta.20158.2
- Microsoft.DotNet.Build.Tasks.SharedFramework.Sdk - 5.0.0-beta.20158.2
- Microsoft.DotNet.Build.Tasks.TargetFramework.Sdk - 5.0.0-beta.20158.2
- Microsoft.DotNet.CodeAnalysis - 5.0.0-beta.20158.2
- Microsoft.DotNet.GenAPI - 5.0.0-beta.20158.2
- Microsoft.DotNet.GenFacades - 5.0.0-beta.20158.2
- Microsoft.DotNet.Helix.Sdk - 5.0.0-beta.20158.2
- Microsoft.DotNet.RemoteExecutor - 5.0.0-beta.20158.2
- Microsoft.DotNet.XUnitConsoleRunner - 2.5.1-beta.20158.2