Update openpyxl dependency

[evaneill]

The current setup.py fixes the openpyxl dependency at 3.0.9 because later versions break one very specific segment of code in adapter.to_python here.

I think this could be fixed with:

if hasattr(self.wb.defined_names,"definedName"):
  # This case is for openpyxl <3.1.0
  all_input_ranges = {object_range.name for object_range in self.wb.defined_names.definedName}
else:
  # This case is for openpyxl ≥3.1.0
  all_input_ranges = set(self.wb.defined_names.keys())

This change was capable of getting around the error in my local environment and working, but it should be tried and ran through the adapter tests. If all seems good, then I'd advise just getting rid of the version requirement on openpyxl