Bump Polyfill from 8.3.0 to 8.4.0#306

dependabot[bot] wants to merge 1 commit intomainVerifyTests/Verify.SystemJson:mainfrom

dependabot/nuget/src/Polyfill-8.4.0VerifyTests/Verify.SystemJson:dependabot/nuget/src/Polyfill-8.4.0Copy head branch name to clipboard