TST: Raise remote data error if no expiry dates are found (io.data.Options)
BUG: concat of series of dtype category converting to object dtype (GH8641)
Merge pull request #8763 from dstephens99/issue8761

TST: Raise remote data error if no expiry dates are found (Options)
Merge pull request #8714 from jreback/series_concat

BUG: concat of series of dtype category converting to object dtype (GH8641)
BLD: remove network tests from 3.2 build
BUG: Fix plots showing 2 sets of axis labels when the index is a timeseries.