Update ember-truth-helpers to 1.2.0.
Update ember-truth-helpers to 1.2.0.

chasballew/dashboard.aptible.com,aptible/dashboard.aptible.com,chasballew/dashboard.aptible.com,chasballew/dashboard.aptible.com,blakepettersson/dashboard.aptible.com,blakepettersson/dashboard.aptible.com,blakepettersson/dashboard.aptible.com,aptible/dashboard.aptible.com,aptible/dashboard.aptible.com