`--workers` should be explicitly an integer
`--workers` should be explicitly an integer

Fixed regression from 12697cd16d0b80f78bc4ca89c679322f7894f4c7

JackDanger/sentry,beeftornado/sentry,gencer/sentry,alexm92/sentry,jean/sentry,alexm92/sentry,JamesMura/sentry,mvaled/sentry,BuildingLink/sentry,looker/sentry,mvaled/sentry,ifduyue/sentry,BuildingLink/sentry,mvaled/sentry,JackDanger/sentry,JamesMura/sentry,mitsuhiko/sentry,zenefits/sentry,looker/sentry,BuildingLink/sentry,ifduyue/sentry,jean/sentry,JackDanger/sentry,looker/sentry,BuildingLink/sentry,gencer/sentry,fotinakis/sentry,ifduyue/sentry,gencer/sentry,fotinakis/sentry,mvaled/sentry,mvaled/sentry,fotinakis/sentry,zenefits/sentry,beeftornado/sentry,looker/sentry,fotinakis/sentry,jean/sentry,alexm92/sentry,looker/sentry,JamesMura/sentry,jean/sentry,gencer/sentry,mvaled/sentry,BuildingLink/sentry,zenefits/sentry,JamesMura/sentry,beeftornado/sentry,jean/sentry,mitsuhiko/sentry,ifduyue/sentry,JamesMura/sentry,ifduyue/sentry,zenefits/sentry,gencer/sentry,zenefits/sentry