• Support for newer versions of numpy >= 1.21 and h5py >= 3.0
• Improved internal HDF5 structure for python dictionaries (no longer trailing /data)
• Deprecated use of dill in favor of in-built pickle (given the updates to pickle functionality in Py3, and issues with numpy dtypes)
• Switched to github actions for CI
• Objects referred to multiple times are now only dumped once within the HDF5 file (HEP002)