Upgrade to ember cli 2.13.2

[aaronfischer]

What does this pull request do?

Upgrades to ember-cli 2.13.2

What are the relevant issues?

Any background context you want to provide?

This is branch off #82 (however, yuidocs had to be disabled due to a conflict with broccoli and yuidocs, hoping we can re-enable when an update surfaces).

Definition of Done:

Each should be selected to indicate consideration for applicability and/or completion.

• Does this PR fully satisfy the scope as outlined in the referenced issue(s)?
• Is there appropriate test coverage?
• Is static analysis resulting in a satisfactory score?
• If adding new dependencies, does pip requirements need to be updated?
• Has the change log been updated?