Key Error Updating Logger

Branch: develop/1.1

```
self.cf_options[k]["previous"].append(self.cf_options[k]["current"])
KeyError: 'previous'
```

caused by logger options not having a `previous` key, https://github.com/Azure/counterfit/blob/ff4f3c7c593856830e5a9b07bd1627f71fbcfc61/counterfit/core/options.py#L27

Fix:

```python
"logger": {
"default": "basic",
"current": "basic",
"previous": [],
"docs": "Logger to log queries with"
}
```