Updated lockfile
Updated lockfile

refs https://github.com/TryGhost/Admin/commit/4f2af95afea46b4f6d7346973e1ae13832446b2c

- 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,TryGhost/Ghost,TryGhost/Ghost