Re-registration of xlwt for pandas
copied from cf-post-staging / pandas-xlwtAs the xlwt package is no longer maintained, the xlwt engine of pandas was removed. But there are some legacy APIs that still only support older MS Excel 97/2000/XP/2003 XLS files. This module contains xlwt engine copied from pandas v1.5.3 and re-registers it when you import pandas_xlwt, eventually allow pandas versions above 2.0.0 output xls format file.
