Fixing .NET Code analyzers.

Author: Stefán J. Sigurðarson

projects/RabbitMQ.Client/RabbitMQ.Client.csproj

@@ -31,10 +31,6 @@
     <ReleaseVersion>8.0</ReleaseVersion>
   </PropertyGroup>
 
-  <PropertyGroup>
-    <AnalysisMode>AllEnabledByDefault</AnalysisMode>
-  </PropertyGroup>
-
   <PropertyGroup Condition="'$(CONCOURSE_CI_BUILD)' == 'true'">
     <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
     <Deterministic>true</Deterministic>
@@ -67,6 +63,7 @@
     <PackageReference Include="MinVer" Version="2.4.0" PrivateAssets="All" />
     <PackageReference Include="System.Memory" Version="4.5.4" />
     <PackageReference Include="System.Threading.Channels" Version="5.0.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="5.0.3" />
   </ItemGroup>
 
 </Project>