Move Sauce key to JWT

[ScottFreeCode]

I figure we'll test whether this works for a PR, then look at the branch and test whether it works for non-PR commits before merging into master, and if both those work then we can consider #2602 handled.

[ScottFreeCode]

Clearly I missed something, as this isn't getting all the Sauce credential stuff it's looking for: https://travis-ci.org/mochajs/mocha/jobs/179248317#L876

[ScottFreeCode]

Hmm. Even with SAUCE_USERNAME separately set, it's still getting this: https://travis-ci.org/mochajs/mocha/jobs/179251815#L876 Maybe it needs the SAUCE_ACCESS_KEY alone re-encrypted (because the old encrypted setting contained both)?

[dasilvacontin]

Maybe it needs the SAUCE_ACCESS_KEY alone re-encrypted (because the old encrypted setting contained both)

Sounds likely!

[boneskull]

@ScottFreeCode SAUCE_USERNAME and SAUCE_ACCESS_KEY is also in the settings which may be conflicting?

[boneskull]

This is likely superceded by #2861.