[master] Update dependencies from dotnet/aspnetcore-tooling

[dotnet-maestro]

This pull request updates the following dependencies

From https://github.com/dotnet/aspnetcore-tooling

• Subscription: ed1c2bc3-ada8-4f10-fd59-08d7a4f28342
• Build: 20200404.9
• Date Produced: 4/5/2020 4:53 AM
• Commit: 798d43f6f6e0c2019a91ace37dfd3c434d17ed50
• Branch: refs/heads/master
• Updates:
  • Microsoft.NET.Sdk.Razor -> 5.0.0-preview.4.20204.9

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