[release/5.0.1xx-preview8] Update dependencies from microsoft/vstest

[dotnet-maestro]

This pull request updates the following dependencies

From https://github.com/microsoft/vstest

• Subscription: 7ed3ff5b-1270-4370-3cc2-08d824643728
• Build: 20200730-02
• Date Produced: 7/30/2020 10:49 AM
• Commit: ddb755f58160c0e7fab50964d665be1bf47ff579
• Branch: refs/heads/master

• Updates:
  • Microsoft.NET.Test.Sdk: from 16.8.0-preview-20200728-02 to 16.8.0-preview-20200730-02

[dotnet-maestro]

Auto-Merge Status

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

• ✔️ Standard Merge Policies Succeeded - Successful checks: dotnet-sdk-public-ci, dotnet-sdk-public-ci (Build Darwin Build_Release), dotnet-sdk-public-ci (Build Darwin Build_Debug), dotnet-sdk-public-ci (Build Ubuntu_16_04 Build_Release), dotnet-sdk-public-ci (Build Windows_NT Build_Release), dotnet-sdk-public-ci (Build Windows_NT_FullFramework Build_Release), dotnet-sdk-public-ci (Build Ubuntu_16_04 Build_Debug), dotnet-sdk-public-ci (Build Windows_NT Build_Debug), dotnet-sdk-public-ci (Build Windows_NT_FullFramework Build_Debug), dotnet-sdk-public-ci (Build Windows_NT_TestAsTools Build_Debug)
• ✔️ Standard Merge Policies Succeeded - No reviews have requested changes.
• ✔️ Standard Merge Policies Succeeded - No version downgrade detected.