Incorrect matplotlib dependency

[DManowitz]

According to setup.cfg, v0.3.48 requires matplotlib>=3.4. However, at least in _compay.py, I see in the switch from v0.3.46 to v0.3.47 that the code for matplotlib<3.8 has been removed, so this package now requires matplotlib>=3.8, or it needs a fix to match the matplotlib>=3.4 dependency.

[andrzejnovak]

Thanks for reporting it. My bandwidth is a bit full at the moment, but I'll take a look next week,