What's Changed
* tests: add placeholders for unlink/rmdir by efiop in https://github.com/iterative/dvc-ssh/pull/54
* cruft: update template by efiop in https://github.com/iterative/dvc-ssh/pull/55
* breaking: use fsspec.callbacks instead of dvc_objects.callbacks by skshetry in https://github.com/iterative/dvc-ssh/pull/56
**Full Changelog**: https://github.com/iterative/dvc-ssh/compare/3.0.0...4.0.0