* [haskell-http-client] tests - in Arbitrary instances, reduce the size for non-primitive fields to prevent infinite recursion
* [haskell-http-client] tests - generate Nothing instead of (Just Null :: Maybe A.Value) to avoid roundtrip test errors
* add support for auth methods
* use newtypes for required params
* fix duplicate operationId issues
* prevent aliasing of vendorextension references in fromOperation
* add --fast to stack ci build