These are the changes in pandas 1.1.0. See Release Notes for a full changelog including other versions of pandas.
Bug in Timestamp where constructing Timestamp from ambiguous epoch time and calling constructor again changed Timestamp.value() property (GH24329)
Timestamp
Timestamp.value()
Bug in Series construction from NumPy array with big-endian datetime64 dtype (GH29684)
Series
datetime64
Bug in DataFrame.pivot_table() when only MultiIndexed columns is set (GH17038)
DataFrame.pivot_table()
Bug in crosstab() when inputs are two Series and have tuple names, the output will keep dummy MultiIndex as columns. (GH18321)
crosstab()