CI failures on Uno.QuickStart

[ghuntley]

Looks to be a configuration issue as UWP compiles fine from master. See https://uno-platform.visualstudio.com/Uno%20Platform/_build/results?buildId=4927 for specifics.

[artemious7]

The UWP certificate MyApp.UWP/MyApp.UWP_TemporaryKey.pfx expired in May this year.

I tried to fix this but it didn't help.
I created a new certificate as explained here in the docs.

The powershell commands for this project:

New-SelfSignedCertificate -Type Custom -Subject "CN=com.example" -KeyUsage DigitalSignature -FriendlyName "Uno.Quickstart MyApp UWP certificate" -CertStoreLocation "Cert:\CurrentUser\My" -TextExtension @("2.5.29.37={text}1.3.6.1.5.5.7.3.3", "2.5.29.19={text}")

This command will display the new certificate thumbprint (C302F4B94B899C21E9B136FF03493918BE82228B), which we should use in the export command:

$pwd = ConvertTo-SecureString -String 1234 -Force -AsPlainText 
Export-PfxCertificate -cert "Cert:\CurrentUser\My\C302F4B94B899C21E9B136FF03493918BE82228B" -FilePath "C:\Users\User\source\repos\Uno.QuickStart\src\MyApp.UWP\MyApp.UWP_TemporaryKey.pfx" -Password $pwd

Then I simply disabled signing by adding the parameter /p:AppxPackageSigningEnabled=false to the msbuildArgs section in the YAML file. And the build was successful.