Bump StyleCop.Analyzers from 1.2.0-beta.354 to 1.2.0-beta.66 in /eng/dependabot#4

dependabot[bot] wants to merge 1 commit intomaindfederm/msbuild:mainfrom

dependabot/nuget/eng/dependabot/StyleCop.Analyzers-1.2.0-beta.66dfederm/msbuild:dependabot/nuget/eng/dependabot/StyleCop.Analyzers-1.2.0-beta.66Copy head branch name to clipboard