releases: correct latest release in project response
releases: correct latest release in project response

Use date_released when possible, and fallback to date_added.

looker/sentry,ifduyue/sentry,mvaled/sentry,ifduyue/sentry,ifduyue/sentry,looker/sentry,gencer/sentry,gencer/sentry,ifduyue/sentry,beeftornado/sentry,mvaled/sentry,gencer/sentry,mvaled/sentry,mvaled/sentry,mvaled/sentry,beeftornado/sentry,ifduyue/sentry,gencer/sentry,looker/sentry,mvaled/sentry,gencer/sentry,beeftornado/sentry,looker/sentry,looker/sentry