[json] Bower.json has a authors attibribue but default code complete proposes author

- bower.json
- in empty file activate code complete
- accept proposal
- it inserts

``` json
{
    "name": "name",
    "description": "description",
    "author": "author",
    "version": "1.0.0",
    "main": "pathToMain",
    "dependencies": {}
}
```

Observe: it inserts a author field however bower files do have a authors field.
