Updated lockfile
Updated lockfile

refs https://github.com/TryGhost/Admin/commit/4f0f9654a04f69d1d73d086c4981a6c46c526f39

- the bump to `TryGhost/ember-promise-modals#v2.0.0+ghost.2` didn't
  include the lockfile changes so this commit updates it

TryGhost/Ghost-Admin,TryGhost/Ghost-Admin