Added notice about removing hoptoad rake tasks to upgrade gem
Added notice about removing hoptoad rake tasks to upgrade gem

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