* Update dependencies from https://github.com/dotnet/arcade build 20190726.18

- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19376.18
- Microsoft.DotNet.GenAPI - 1.0.0-beta.19376.18
- Microsoft.DotNet.Helix.Sdk - 2.0.0-beta.19376.18

* Update dependencies from https://github.com/dotnet/arcade build 20190727.2

- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19377.2
- Microsoft.DotNet.GenAPI - 1.0.0-beta.19377.2
- Microsoft.DotNet.Helix.Sdk - 2.0.0-beta.19377.2

* Update dependencies from https://github.com/dotnet/arcade build 20190728.1

- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19378.1
- Microsoft.DotNet.GenAPI - 1.0.0-beta.19378.1
- Microsoft.DotNet.Helix.Sdk - 2.0.0-beta.19378.1