apiCheck warnings when using an object for select options

[eliagentili]

My server API return an object like this that i need to use for populating my select input:

{
  'iron_man': 'Iron Man',
  'captain_america': 'Captain America',
  'black_widow': 'Black Widow',
  'hulk': 'Hulk',
  'captain_marvel': 'Captain Marvel',
}

i can handle this format with ngOptions, but even if this works, i get a warning in dev tools from apiCheck.

You can see an example here (open your dev tools!):

• http://jsbin.com/gikiji/3/edit?js,output

I can fix that with a pull request simply changing the apiCheck for handling also objects instead of only arrays.