[TEMPORARY] Test if Ruby 2.7 is supported by AppVeyor
Created by: pirj
Will send a proper horde of pull requests from rspec-dev if it does.
Aimed at reproducing #2650
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Created by: pirj
Will send a proper horde of pull requests from rspec-dev if it does.
Aimed at reproducing #2650