Bump raven-js to 3.4.0 (#3890)
Bump raven-js to 3.4.0 (#3890)

/cc @getsentry/team
fotinakis/sentry,looker/sentry,gencer/sentry,fotinakis/sentry,beeftornado/sentry,BuildingLink/sentry,gencer/sentry,mvaled/sentry,zenefits/sentry,JamesMura/sentry,mvaled/sentry,JamesMura/sentry,JackDanger/sentry,BuildingLink/sentry,zenefits/sentry,beeftornado/sentry,looker/sentry,fotinakis/sentry,BuildingLink/sentry,jean/sentry,mvaled/sentry,ifduyue/sentry,JamesMura/sentry,mvaled/sentry,BuildingLink/sentry,ifduyue/sentry,JamesMura/sentry,gencer/sentry,zenefits/sentry,JackDanger/sentry,gencer/sentry,ifduyue/sentry,jean/sentry,mvaled/sentry,mvaled/sentry,jean/sentry,alexm92/sentry,ifduyue/sentry,JamesMura/sentry,zenefits/sentry,looker/sentry,alexm92/sentry,jean/sentry,looker/sentry,looker/sentry,zenefits/sentry,jean/sentry,beeftornado/sentry,fotinakis/sentry,gencer/sentry,BuildingLink/sentry,JackDanger/sentry,alexm92/sentry,ifduyue/sentry