Updating README with supported versions of Rails
Updating README with supported versions of Rails

thoughtbot/airbrake,nick-desteffen/airbrake,square/hoptoad_notifier,airbrake/airbrake,Shopify/airbrake,airbrake/airbrake,kakra/hoptoad_notifier,nick-desteffen/airbrake,CarlosCD/airbrake,benjaminoakes/airbrake,stevecrozz/hydraulic_brake,thoughtbot/hoptoad_notifier,CarlosCD/airbrake