fix: handle deserializing and writing empty security requirements #1426#2323

MaggieKimani1 merged 4 commits intomicrosoft:mainmicrosoft/OpenAPI.NET:mainfrom

paulmendix:fix-no-difference-between-empty-and-no-security-requirements-on-operationpaulmendix/OpenAPI.NET:fix-no-difference-between-empty-and-no-security-requirements-on-operationCopy head branch name to clipboard