[AIRFLOW-4299] Upgrade to Celery 4.3.0 to fix crashing workers (#5116)
[AIRFLOW-4299] Upgrade to Celery 4.3.0 to fix crashing workers (#5116)


owlabs/incubator-airflow,owlabs/incubator-airflow,owlabs/incubator-airflow,owlabs/incubator-airflow