groupsEnabled overrides groupsDisabled

ex. log

`bragi.log("test:func:debug", "some text")`

```
$.options.groupsEnabled = [/:test/]
$.options.groupsDisabled = [/:debug/]
```

This will still show the above log

I would expect it to only show logs where the groupsEnabled and groupsDisabled do not conflict. Also this does not match the behavior of when groupsEnabled is set to true.
