Pin h5py < 3.0.0
Fix h5py < 3.0.0 (#855) So that packages having as dependencies both bluepy and neurom (like morph-validator), get h5py < 3. Otherwise bluepy breaks
Fix h5py < 3.0.0 (#855) So that packages having as dependencies both bluepy and neurom (like morph-validator), get h5py < 3. Otherwise bluepy breaks