Fix namespace and codesign for analysis assembly

Author: kzu

src/CodeAnalysis/CodeAnalysis.csproj

@@ -4,6 +4,7 @@
     <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>WebSocketChannel.CodeAnalysis</AssemblyName>
     <PackFolder>analyzers/dotnet/roslyn4.0</PackFolder>
+    <SignAssembly>false</SignAssembly>
   </PropertyGroup>
 
   <ItemGroup>

src/CodeAnalysis/SponsorLinker.cs

@@ -3,7 +3,7 @@
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.Diagnostics;
 
-namespace Mvp.Xml;
+namespace WebSocketChannel;
 
 [DiagnosticAnalyzer(LanguageNames.CSharp, LanguageNames.VisualBasic, LanguageNames.FSharp)]
 class SponsorLinker : SponsorLink