update pandas to 1.0.2
Summary: Update pandas to 1.0.2. This is a major release from the 0.24 series, and contains hundreds of changes. A large number of previously deprecated APIs are now removed. A complete changelog can be found at https://pandas.pydata.org/docs/whatsnew/v1.0.2.html.
Test Plan: import pandas, load dataframes from an .hdf file, read/write a dataframe.
Reviewers: Triage Team, JoshStrobl
Reviewed By: Triage Team, JoshStrobl
Subscribers: kyrios123, JoshStrobl, joebonrichie, EP01
Differential Revision: https://dev.getsol.us/D8503