Update StyleCop.

Author: bgrainger

src/Directory.Build.props

@@ -32,7 +32,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.354">
+    <PackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.376">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>