Update to StyleCop.Analyzers 1.2.0-beta.556

Author: sharwell

StyleCop.Analyzers/Directory.Build.props

@@ -51,7 +51,7 @@
   <ItemGroup>
     <PackageReference Include="AsyncUsageAnalyzers" Version="1.0.0-alpha003" PrivateAssets="all" />
     <PackageReference Include="DotNetAnalyzers.DocumentationAnalyzers" Version="1.0.0-beta.46" PrivateAssets="all" />
-    <PackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.435" PrivateAssets="all" />
+    <PackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.556" PrivateAssets="all" />
     <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="$(SharedMicrosoftCodeAnalysisAnalyzersVersion)" PrivateAssets="all" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.CodeStyle" Version="4.0.1" PrivateAssets="all" />
   </ItemGroup>