[gh-1351] Update Roslyn version in Default branch

Author: ashmind

source/Server/Server.csproj

@@ -38,10 +38,10 @@
     <PackageReference Include="JetBrains.Annotations" Version="10.4.0" />
     <PackageReference Include="Microsoft.ApplicationInsights" Version="2.17.0" />
     <PackageReference Include="Microsoft.Azure.Cosmos.Table" Version="1.0.8" />
-    <PackageReference Include="Microsoft.CodeAnalysis.Common" Version="4.8.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Features" Version="4.8.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.VisualBasic.Features" Version="4.8.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.Common" Version="4.8.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.Common" Version="4.12.0-3.final" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Features" Version="4.12.0-3.final" />
+    <PackageReference Include="Microsoft.CodeAnalysis.VisualBasic.Features" Version="4.12.0-3.final" />
+    <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.Common" Version="4.12.0-3.final" />
     <PackageReference Include="Microsoft.Diagnostics.Runtime" Version="3.1.512801" />
     <PackageReference Include="Microsoft.ILVerification" Version="7.0.0-preview.4.22229.4" />
     <PackageReference Include="Microsoft.IO.RecyclableMemoryStream" Version="2.2.0" />

source/Tests/Decompilation/TestCode/Lambda.CallInArray.cs

@@ -55,7 +55,7 @@ public void M()
 internal sealed class <PrivateImplementationDetails>
 {
     [StructLayout(LayoutKind.Explicit, Pack = 1, Size = 16)]
-    private struct __StaticArrayInitTypeSize=16
+    internal struct __StaticArrayInitTypeSize=16
     {
     }