Merge pull request #1409 from microsoft/renovate/dotnet-monorepo

Update dotnet monorepo to 4.12.0

Author: renovate[bot]

Directory.Packages.props

@@ -6,7 +6,7 @@
     <CentralPackageTransitivePinningEnabled>true</CentralPackageTransitivePinningEnabled>
     <MicroBuildVersion>2.0.181</MicroBuildVersion>
     <CodeAnalysisVersion>3.11.0</CodeAnalysisVersion>
-    <CodeAnalysisVersionForTests>4.4.0</CodeAnalysisVersionForTests>
+    <CodeAnalysisVersionForTests>4.12.0</CodeAnalysisVersionForTests>
     <CodefixTestingVersion>1.1.2</CodefixTestingVersion>
     <MicrosoftDiagnosticsRuntimeVersion>3.1.525101</MicrosoftDiagnosticsRuntimeVersion>
     <CodeAnalysisAnalyzerVersion>3.11.0-beta1.24527.2</CodeAnalysisAnalyzerVersion>