Update .NET packages to v9

Author: renovate[bot]

Directory.Packages.props

@@ -15,22 +15,22 @@
     <PackageVersion Include="MessagePackAnalyzer" Version="$(MessagePackVersion)" />
     <PackageVersion Include="Microsoft.AspNetCore.TestHost" Version="2.2.0" />
     <PackageVersion Include="Microsoft.AspNetCore" Version="2.3.0" />
-    <PackageVersion Include="Microsoft.Bcl.AsyncInterfaces" Version="8.0.0" />
+    <PackageVersion Include="Microsoft.Bcl.AsyncInterfaces" Version="9.0.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.PublicApiAnalyzers" Version="$(CodeAnalysisAnalyzerVersion)" />
     <PackageVersion Include="Microsoft.VisualStudio.Threading.Analyzers" Version="$(VisualStudioThreadingVersion)" />
     <PackageVersion Include="Microsoft.VisualStudio.Threading.Only" Version="$(VisualStudioThreadingVersion)" />
     <PackageVersion Include="Microsoft.VisualStudio.Threading" Version="$(VisualStudioThreadingVersion)" />
     <PackageVersion Include="Microsoft.VisualStudio.Validation" Version="17.8.8" />
     <PackageVersion Include="Nerdbank.Streams" Version="2.12.84-alpha" />
     <PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />
-    <PackageVersion Include="System.Collections.Immutable" Version="8.0.0" />
-    <PackageVersion Include="System.Diagnostics.DiagnosticSource" Version="8.0.1" />
-    <PackageVersion Include="System.IO.Pipelines" Version="8.0.0" />
+    <PackageVersion Include="System.Collections.Immutable" Version="9.0.0" />
+    <PackageVersion Include="System.Diagnostics.DiagnosticSource" Version="9.0.0" />
+    <PackageVersion Include="System.IO.Pipelines" Version="9.0.0" />
     <PackageVersion Include="System.IO.Pipes" Version="4.3.0" />
     <PackageVersion Include="System.Net.Http" Version="4.3.4" />
-    <PackageVersion Include="System.Reflection.Metadata" Version="8.0.1" />
-    <PackageVersion Include="System.Text.Json" Version="8.0.5" />
-    <PackageVersion Include="System.Threading.Tasks.Dataflow" Version="8.0.1" />
+    <PackageVersion Include="System.Reflection.Metadata" Version="9.0.0" />
+    <PackageVersion Include="System.Text.Json" Version="9.0.0" />
+    <PackageVersion Include="System.Threading.Tasks.Dataflow" Version="9.0.0" />
     <PackageVersion Include="System.ValueTuple" Version="4.5.0" />
     <PackageVersion Include="xunit.combinatorial" Version="2.0.24" />
     <PackageVersion Include="xunit.runner.console" Version="2.9.3" />