Fix WorkerState.is_alive() not accurate when settings.USE_TZ = True and the local timezone is not UTC
Merge branch 'release/fix_worker_state_is_alive' into feature/fix_worker_state_is_alive
Merge pull request #332 from rockallite/feature/fix_worker_state_is_alive

Fix WorkerState.is_alive() not accurate when settings.USE_TZ = True and ...