show targets

GET targets

OKAY, WARNING, EXCEEDED

```
{
    "interval_type": "month",
    "interval": {
        "start": "2018-06-30T23:00:00Z",
        "end": "2018-07-31T22:59:59.999Z"
    },
    "currency": "GBP",
    "targets": [
        {
            "type": "category",
            "name": "general",
            "amount": 4000,
            "status": "OKAY"
        },
```