added whatsnew0.20.2 entry

Author: RobinFiveWords

doc/source/whatsnew/v0.20.2.txt

@@ -84,6 +84,7 @@ Reshaping
 - Bug in ``DataFrame.stack`` with unsorted levels in MultiIndex columns (:issue:`16323`)
 - Bug in ``pd.wide_to_long()`` where no error was raised when ``i`` was not a unique identifier (:issue:`16382`)
 - Bug in ``Series.isin(..)`` with a list of tuples (:issue:`16394`)
+- Bug in ``maybe_infer_to_datetimelike()`` in ``core.dtypes.cast`` where result was not reshaped in all cases (:issue:`16395`)
 
 
 Numeric