Upgrade to ember-cli-babel@^6.0.0

[Blackening999]

This addon is outdated with the recent Ember versions

ember-elsewhere@^1.0.1:
  version "1.0.1"
  resolved "https://registry.yarnpkg.com/ember-elsewhere/-/ember-elsewhere-1.0.1.tgz#19162550a71d719fe536853fb03a031cf6edee59"
  dependencies:
    ember-cli-babel "^5.1.7"
    ember-cli-htmlbars "^1.1.0"

$> ember -v

ember-cli: 2.14.1
node: 8.2.1
os: darwin x64