deps: upgrade to npm 2.11.2
https://github.com/npm/npm/releases/tag/v2.11.2 has the details. Version bumps, doc fixes and some minor bug fixes.
r: @Fishrock123 r: @chrisdickinson
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
https://github.com/npm/npm/releases/tag/v2.11.2 has the details. Version bumps, doc fixes and some minor bug fixes.
r: @Fishrock123 r: @chrisdickinson