Unit tests fail due to unhandled rejection in angular-mocks

[jwngr]

Version info

Branch: master

Chrome: 55.0.2883

Node.js: 4.4.5

Steps to reproduce

Simply run grunt test:unit.

Expected behavior

Tests pass without any errors.

Actual behavior

Tests return the following error in the angular-mocks dependency:

  √ should return true once $loaded() promise is rejected
$ref
  √ should return Firebase instance it was created with
Chrome 56.0.2924 (Windows 8.1 0.0.0) ERROR
  Uncaught Possibly unhandled rejection: {}
  at .../angularfire/node_modules/angular-mocks/angular-mocks.js:250
Chrome 56.0.2924 (Windows 8.1 0.0.0) ERROR
  Uncaught Possibly unhandled rejection: {}
  at .../angularfire/node_modules/angular-mocks/angular-mocks.js:250

[jwngr]

I believe this is caused by angular/angular.js#15516 and should be fixed by simply updating the angular-mocks dependency. PR incoming.