What's Changed
* benchmark: fail testsuite if they become slower; make it easier to see reports by skshetry in https://github.com/iterative/dvc-data/pull/128
* hash_info: use attrs slotted class by skshetry in https://github.com/iterative/dvc-data/pull/129
* Fix pypy run by skshetry in https://github.com/iterative/dvc-data/pull/130
* meta: use attrs by skshetry in https://github.com/iterative/dvc-data/pull/131
* diff: use attrs by skshetry in https://github.com/iterative/dvc-data/pull/132
**Full Changelog**: https://github.com/iterative/dvc-data/compare/0.1.17...0.1.18