Bump sparks req to 2.4.
Bump sparks req to 2.4.
1flow/1flow,WillianPaiva/1flow,1flow/1flow,WillianPaiva/1flow,WillianPaiva/1flow,WillianPaiva/1flow,1flow/1flow,1flow/1flow,WillianPaiva/1flow,1flow/1flow