Update the Celery package to 4.3.0
We want to use the remote breakpoint to debug the Celery tasks and the remote breakpoint was added in Celery release 4.3.0:
https://github.com/celery/celery/commit/f1a7b6eb82f9fb0222f22adfed277d0d7169dc91
We want to use the remote breakpoint to debug the Celery tasks and the remote breakpoint was added in Celery release 4.3.0:
https://github.com/celery/celery/commit/f1a7b6eb82f9fb0222f22adfed277d0d7169dc91