* Remove abstractmethod for proxy plugin base class, remove unused methods from bundled plugins
* Move httpStatusCodes, httpMethods and Url within top-level proxy.http package
* Use suggested fix in #683 to remove pytest ignore
* Handle should not flush now which can block, instead let base tcp handler do its magic
* test speed up, doc string, logging enhancements
* Move macOS to the end of workflows
* Fix mypy warnings