v1.6.5 - bump minimum pydantic version

v1.6.4 - combinatoric testing

v1.6.3 - life h5py cap

v1.6.1 - Union types

v1.6.0 - roundtrip JSON serialization

v1.5.3 - bugfix empty hdf5 datasets

v1.5.2 - datetime support for hdf5

v1.5.1 - bugfix array validation