[release/3.1.1xx] Update dependencies from aspnet/AspNetCore

[dotnet-maestro]

This pull request updates the following dependencies

From https://github.com/aspnet/AspNetCore

• Build: 20191028.8
• Date Produced: 10/29/2019 6:20 AM
• Commit: 471e4710a818849eaf22c5977281d10fd6758616
• Branch: refs/heads/release/3.1-preview2
• Updates:
  • Microsoft.AspNetCore.DeveloperCertificates.XPlat -> 3.1.0-preview2.19528.8

[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 CLI CI, .NET Core CLI CI (Build Linux Build_LinuxPortable_NoSuffix_Release_x64), .NET Core CLI CI (Build Linux Build_LinuxPortable_Release_x64), .NET Core CLI CI (Build Linux Build_Linux_musl_Debug_x64), .NET Core CLI CI (Build Linux Build_Rhel_6_Debug_x64), .NET Core CLI CI (Build Linux Build_Rhel_7_2_Release_x64), .NET Core CLI CI (Build Linux Build_Debian_jessie_Debug_x64), .NET Core CLI CI (Build Linux Build_CentOS_7_1_Debug_x64), .NET Core CLI CI (Build Darwin Build_Release), .NET Core CLI CI (Build Linux Build_OpenSUSE_42_3_Debug_x64), .NET Core CLI CI (Build Linux Build_Fedora_27_Debug_x64), .NET Core CLI CI (Build Windows_NT Build_Release_x64), .NET Core CLI CI (Build Linux Build_Ubuntu_18_04_Debug_x64), .NET Core CLI CI (Build Windows_NT Build_DropSuffix_Release_x64), .NET Core CLI CI (Build Linux Build_Ubuntu_16_04_Debug_x64), .NET Core CLI CI (Build Windows_NT Build_ES_Debug_x64), .NET Core CLI CI (Build Linux Build_Ubuntu_14_04_Release_x64), .NET Core CLI CI (Build Windows_NT Build_Debug_x86)
• ✔️ Standard Merge Policies Succeeded - No reviews have requested changes.