Tests

Convert docstrings to `numpydoc` style #457

Job	Run time
py3.9 - on ubuntu-latest	25s
py3.10 with Coverage - on ubuntu-latest	31s
Importing bapsflib	16s
py3.9 - on macos-latest	20s
py3.9 - on windows-latest	1m 2s
py3.10 - on macos-latest	21s
py3.10 - on windows-latest	55s
py3.11 - on ubuntu-latest	25s
py3.11 - on macos-latest	18s
py3.11 - on windows-latest	1m 4s
py3.12 - on ubuntu-latest	30s
py3.12 - on macos-latest	18s
py3.12 - on windows-latest	1m 8s
Min Vers \| py-3.9 \| h5py v3.0	23s
Min Vers \| py-3.9 \| h5py v3.0 numpy v1.20	26s
Packaging	40s
	9m 2s

Provide feedback