Arrays of length 1 are collapsed into objects

A json file with contents:

```
{
    "maintainers": [
        {
            "name": "Paul Sexton",
            "email": "psexton@gnresound.com"
        }
    ]
}
```

if passed through `loadjson` and `savejson`, will turn into a json file with contents:

```
{
        "maintainers": {
            "name": "Paul Sexton",
            "email": "psexton@gnresound.com"
        }
}
```
