[master] Update dependencies from dotnet/windowsdesktop

[dotnet-maestro]

This pull request updates the following dependencies

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

• Build: 20191009.2
• Date Produced: 10/9/2019 2:14 PM
• Commit: 248d65391a1daed6135e7d049ceb79c092df8933
• Branch: refs/heads/master
• Updates:
  • Microsoft.WindowsDesktop.App -> 5.0.0-alpha1.19509.2

[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 (Linux Build_LinuxPortable_Release_x64), .NET Core core-sdk CI (Linux Build_Arm_NoSuffix_Release), .NET Core core-sdk CI (Linux Build_LinuxPortable_NoSuffix_Release_x64), .NET Core core-sdk CI (Linux Build_Linux_musl_Debug_x64), .NET Core core-sdk CI (Linux Build_Arm64_Debug), .NET Core core-sdk CI (Linux Build_Arm_Debug), .NET Core core-sdk CI (Linux Build_Rhel_6_Debug_x64), .NET Core core-sdk CI (Linux Build_Rhel_7_2_Release_x64), .NET Core core-sdk CI (Linux Build_Debian_Jessie_Debug_x64), .NET Core core-sdk CI (Linux Build_CentOS_7_1_Debug_x64), .NET Core core-sdk CI (Linux Build_OpenSUSE_42_3_Debug_x64), .NET Core core-sdk CI (Windows_NT Build_Release_arm), .NET Core core-sdk CI (Linux Build_Fedora_29_Debug_x64), .NET Core core-sdk CI (Windows_NT Build_Release_x64), .NET Core core-sdk CI (Linux Build_Fedora_28_Debug_x64), .NET Core core-sdk CI (Windows_NT Build_DropSuffix_Release_x64), .NET Core core-sdk CI (Linux Build_Fedora_27_Debug_x64), .NET Core core-sdk CI (Windows_NT Build_ES_Debug_x64), .NET Core core-sdk CI (Linux Build_Ubuntu_18_04_Debug_x64), .NET Core core-sdk CI (Windows_NT Build_Debug_x86), .NET Core core-sdk CI (Linux Build_Ubuntu_16_04_Debug_x64), .NET Core core-sdk CI (Linux Build_Ubuntu_14_04_Release_x64), .NET Core core-sdk CI (Darwin Build_Release)
• ✔️ Standard Merge Policies Succeeded - No reviews have requested changes.