build(deps): bump stylecop.analyzers in /src (#533)

Bumps [stylecop.analyzers](https://github.com/DotNetAnalyzers/StyleCopAnalyzers) from 1.2.0-beta.435 to 1.2.0-beta.507.
- [Release notes](https://github.com/DotNetAnalyzers/StyleCopAnalyzers/releases)
- [Changelog](https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/KnownChanges.md)
- [Commits](DotNetAnalyzers/StyleCopAnalyzers@1.2.0-beta.435...1.2.0-beta.507)

---
updated-dependencies:
- dependency-name: stylecop.analyzers
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/Directory.build.props

@@ -40,7 +40,7 @@
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" /> 
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="stylecop.analyzers" Version="1.2.0-beta.435" PrivateAssets="all" />
+    <PackageReference Include="stylecop.analyzers" Version="1.2.0-beta.507" PrivateAssets="all" />
     <PackageReference Include="Roslynator.Analyzers" Version="4.3.0" PrivateAssets="All" />
   </ItemGroup>
   <ItemGroup>