Fix rufus-scheduler 3.3.0 ZoTime comparison bug.
Fix rufus-scheduler 3.3.0 ZoTime comparison bug.

Comparison of Time with Rufus::Scheduler::ZoTime failed

lib/sidekiq/cron/job.rb:520:in `<'

farainc/sidekiq-cron,ondrejbartas/sidekiq-cron,ondrejbartas/sidekiq-cron,farainc/sidekiq-cron