Get updated version of pandas (>1.2) and current xlrd

Current version of pandas requires reading xlsx files using the openpyxl engine:

https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.read_excel.htmlen

However, openpyxl is very particular about xlsx files that are generated and those provided by GEOME usually fail.. the fix for now is using an older version of pandas.  However, we will want to upgrade pandas at some point.