Add ruby4.0 to unit tests#855

SB-khushbum wants to merge 4 commits intonextbugsnag/bugsnag-ruby:nextfrom

khushbu/PLAT-15923-add-ruby4.0-unit-testsbugsnag/bugsnag-ruby:khushbu/PLAT-15923-add-ruby4.0-unit-testsCopy head branch name to clipboard