update Babel?

[Luiz-N]

Using Ember 2.18 gives following warning after building:

DEPRECATION: ember-cli-babel 5.x has been deprecated. Please upgrade to at least ember-cli-babel 6.6. Version 5.2.8 located:  ember-cli-jstree -> ember-cli-babel
DEPRECATION: ember-cli-babel 5.x has been deprecated. Please upgrade to at least ember-cli-babel 6.6. Version 5.2.8 located:  ember-cli-jstree -> ember-component-inbound-actions -> ember-cli-babel