lower Microsoft.CodeAnalysis.CSharp.Workspaces to 4.3.1 (#200)

Author: Meir017

src/FluentAssertions.Analyzers/FluentAssertions.Analyzers.csproj

@@ -32,7 +32,7 @@
 
   <ItemGroup>
 	<PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.4" />
-	<PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.6.0" />
+	<PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.3.1" />
   </ItemGroup>
 
   <ItemGroup>