Nightly builds not published to npm (starting 3/8/2017)

[DanielRosenwasser]

For any others who may file this, we're aware of the issue and will have it back up by next week. Thanks!

[sheetalkamat]

Merged PR #22450 and the failures were not reproed since then.

[weswigham]

@sheetalkamat I'm still seeing failures related to watchDirectories that are only repro'ing on the internal CI server? (But they do reliably repro there:)

[sheetalkamat]

verified that #22526 fixes this on CI server as well.