[release/3.1.2xx] Update dependencies from dotnet/arcade

[dotnet-maestro]

This pull request updates the following dependencies

From https://github.com/dotnet/arcade

• Build: 20191203.16
• Date Produced: 12/3/2019 9:25 PM
• Commit: 8e47254f93b276c974968aff83222f89ec3931ed
• Branch: refs/heads/release/3.x
• Updates:
  • Microsoft.DotNet.Arcade.Sdk -> 1.0.0-beta.19603.16

[dotnet-maestro]

Auto-Merge Status

This pull request has been merged because the following merge policies have succeeded.

• ✔️ Standard Merge Policies Succeeded - Successful checks: .NET Core core-sdk CI, .NET Core core-sdk CI (build Windows_NT Build_Debug_x86), .NET Core core-sdk CI (build Linux Build_LinuxPortable_Release_x64), .NET Core core-sdk CI (build Linux Build_Arm_NoSuffix_Release), .NET Core core-sdk CI (build Linux Build_LinuxPortable_NoSuffix_Release_x64), .NET Core core-sdk CI (build Linux Build_Linux_musl_Debug_x64), .NET Core core-sdk CI (build Linux Build_Arm64_Debug), .NET Core core-sdk CI (build Linux Build_Arm_Debug), .NET Core core-sdk CI (build Linux Build_Rhel_6_Debug_x64), .NET Core core-sdk CI (build Darwin Build_Release), .NET Core core-sdk CI (build Linux Build_Rhel_7_2_Release_x64), .NET Core core-sdk CI (build Linux Build_Debian_Stretch_Debug_x64), .NET Core core-sdk CI (build Windows_NT Build_Release_arm), .NET Core core-sdk CI (build Linux Build_CentOS_7_1_Debug_x64), .NET Core core-sdk CI (build Linux Build_Fedora_29_Debug_x64), .NET Core core-sdk CI (build Windows_NT Build_Release_x64), .NET Core core-sdk CI (build Linux Build_Ubuntu_18_04_Debug_x64), .NET Core core-sdk CI (build Windows_NT Build_DropSuffix_Release_x64), .NET Core core-sdk CI (build Linux Build_Ubuntu_16_04_Debug_x64), .NET Core core-sdk CI (build Windows_NT Build_ES_Debug_x64)
• ✔️ Standard Merge Policies Succeeded - No reviews have requested changes.