fix(package): update raven to version 2.4.2
fix(package): update raven to version 2.4.2

Closes #4210
kumar303/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,tsl143/addons-frontend,kumar303/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,tsl143/addons-frontend,mozilla/addons-frontend,tsl143/addons-frontend,mozilla/addons-frontend,kumar303/addons-frontend,kumar303/addons-frontend,mozilla/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,aviarypl/mozilla-l10n-addons-frontend,mozilla/addons-frontend,tsl143/addons-frontend