降低分析器版本，以减少对高版本 VS/MSBuild 的依赖

Author: walterlv

src/dotnetCampus.LatestCSharpFeatures.Analyzer/dotnetCampus.LatestCSharpFeatures.Analyzer.csproj

@@ -10,7 +10,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.4" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.6.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.5.0" />
   </ItemGroup>
 
   <ItemGroup>