forward/rewind not working as intended

When attempting to use `spotify forward 5` it instead jumps to 5s into the current track. When attempting to use `spotify rewind 5` it instead restarts the track at the beginning (ie: jumps to 0s).

```bash
$ spotify forward 5
Jumped to 0min 5s
$ spotify rewind 5
Jumped to 0min 0s
```