[release/5.0.1xx-preview6] Update dependencies from nuget/nuget.client

[dotnet-maestro]

This pull request updates the following dependencies

From https://github.com/NuGet/NuGet.Client

• Subscription: b5286ad6-5e57-4b64-3220-08d8080363b6
• Build: 5.7.0.6653
• Date Produced: 6/16/2020 9:59 PM
• Commit: 728c0ad55c093fb374a1858d9cde5dc94b80c244
• Branch: release-5.7.0-preview.3
• Updates:
  • NuGet.Build.Tasks: from 5.7.0-preview.2.6618 to 5.7.0-preview.3.6653

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