bump sparks requirements to 3.7.7 for a working broker tab in celery flower.
bump sparks requirements to 3.7.7 for a working broker tab in celery flower.

WillianPaiva/1flow,1flow/1flow,1flow/1flow,WillianPaiva/1flow,WillianPaiva/1flow,WillianPaiva/1flow,1flow/1flow,1flow/1flow,WillianPaiva/1flow,1flow/1flow