Add whatsnew entry

Author: roberthdevries

doc/source/whatsnew/v1.1.0.rst

@@ -69,7 +69,7 @@ Other enhancements
 - `OptionError` is now exposed in `pandas.errors` (:issue:`27553`)
 - :func:`timedelta_range` will now infer a frequency when passed ``start``, ``stop``, and ``periods`` (:issue:`32377`)
 - Positional slicing on a :class:`IntervalIndex` now supports slices with ``step > 1`` (:issue:`31658`)
--
+- :meth:`to_csv` now accepts an ``error`` argument (:issue:`22610`)
 
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