v 4+ (dependbot) Need to upgrade async 2.6.4

[TreeMama]

ToDO:

We need to upgrade async to 2.6.4 (click link to see dependbot pull request).

@jgrenadier has already reviewed and found that after we upgrade we will need to make some fixes in the tutorial buttons.

[jgrenadier]

The problem with the tutorial next and skip button positions seems only to do with the Nexus One phone. This dependabot upgrade also causes the same cliipping issue as the dependabot change from 476. The fix in feature/simpleplist476 fixes the clipping issue from this code change but does not fix the Nexus/tutorial problem.