- Updates Omnisharp package versions

- Pins transitive dependency to System.Reactive

NOTICE.txt

@@ -8241,7 +8241,7 @@ SOFTWARE.
 
 ---------------------------------------------------------
 
-System.Reactive 4.4.1 - MIT
+System.Reactive 5.0 - MIT
 
 
 Copyright (c) .NET Foundation and Contributors.

eng/Versions.props

@@ -151,10 +151,11 @@
     <NewtonsoftJsonPackageVersion>13.0.1</NewtonsoftJsonPackageVersion>
     <NerdbankStreamsPackageVersion>2.9.112</NerdbankStreamsPackageVersion>
     <NuGetSolutionRestoreManagerInteropVersion>4.8.0</NuGetSolutionRestoreManagerInteropVersion>
-    <OmniSharpExtensionsLanguageServerPackageVersion>0.19.5</OmniSharpExtensionsLanguageServerPackageVersion>
+    <OmniSharpExtensionsLanguageServerPackageVersion>0.19.7</OmniSharpExtensionsLanguageServerPackageVersion>
     <OmniSharpExtensionsLanguageProtocolPackageVersion>$(OmniSharpExtensionsLanguageServerPackageVersion)</OmniSharpExtensionsLanguageProtocolPackageVersion>
     <OmniSharpMSBuildPackageVersion>1.39.1</OmniSharpMSBuildPackageVersion>
     <StreamJsonRpcPackageVersion>2.14.20</StreamJsonRpcPackageVersion>
+    <SystemReactivePackageVersion>5.0</SystemReactivePackageVersion>
     <SystemRuntimeInteropServicesRuntimePackageVersion>4.3.0</SystemRuntimeInteropServicesRuntimePackageVersion>
     <Tooling_MicrosoftCodeAnalysisAnalyzersPackageVersion>3.3.4</Tooling_MicrosoftCodeAnalysisAnalyzersPackageVersion>
     <Tooling_MicrosoftCodeAnalysisBannedApiAnalyzersPackageVersion>$(Tooling_MicrosoftCodeAnalysisAnalyzersPackageVersion)</Tooling_MicrosoftCodeAnalysisBannedApiAnalyzersPackageVersion>

src/Razor/src/Microsoft.VisualStudio.RazorExtension/Microsoft.VisualStudio.RazorExtension.csproj

@@ -249,6 +249,7 @@
     <!-- We need to directly reference the O# language server here because we mark it as PrivateAssets="All" in our language server itself
     We don't actual use it, but for now WebTools depends on it. -->
     <PackageReference Include="OmniSharp.Extensions.LanguageServer" Version="$(OmniSharpExtensionsLanguageServerPackageVersion)" />
+    <PackageReference Include="System.Reactive" Version="$(SystemReactivePackageVersion)" />
 
     <!--
       Pinning packages to avoid misaligned reference CI failures.