What's Changed
- Remove regex from tests by @adriangb in #13
- add GroupedMetadata as a base class for Interval by @adriangb in #12
- Remove regex from tests (again) by @adriangb in #14
- use init_subclass instead of ABC by @adriangb in #16
- add docs for GroupedMetadata and BaseMetadata by @adriangb in #15
Full Changelog: v0.2.0...v0.3.0