Ember Cli Document Title Versions Save

This version of ember-cli-document-title now depends on Node 4 or greater, and also has the following changes:

• [BREAKING] Update dependencies and project/testing setup to match [email protected] #56 ember-cli-document-title now requires Node 4 or greater.
• Add support for returning a Promise from the titleToken function. #55

You can now return a Promise from your titleToken functions, and the final title will not be resolved until all the promises have been resolved.