## What do these changes do?
This PR prepares for future version 0.2.0 of `nevergrad`, in which each suggestion is a `Candidate` instance having fields `args` and `kwargs` instead of being a `np.ndarray`. The proposed changes are compatible with all versions of `nevergrad` (manually tested with `nevergrad_example.py` on both `master` and current version `v0.1.6`).
See `nevergrad`'s [CHANGELOG](https://github.com/facebookresearch/nevergrad/blob/master/CHANGELOG.md) for more information on the change.
## Related issue number
None
## Linter
- [x] I've run `scripts/format.sh` to lint the changes in this PR.
