add support for xunit SetAsserts Subset#236

Meir017 merged 2 commits intomainfluentassertions/fluentassertions.analyzers:mainfrom

143-xunit-define-codefixes-for-setasserts-assert.propersubsetfluentassertions/fluentassertions.analyzers:143-xunit-define-codefixes-for-setasserts-assert.propersubsetCopy head branch name to clipboard