updated release notes to reflect the v2.2.3 number

Author: R. S. Doiel

release-notes-v2.2.2.md

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+# changes
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+The big change v2.2.1 was the last release supporting the C Shared library called libdataset. Starting with v2.2.2 libdataset.py wraps the dataset cli allowing the main dataset.py definition to remain the same.
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+This release of py_dataset no longer uses the C Shared library. Instead is requires that dataset v2.2.3 or better is installed on the system. It now wraps the command line dataset comment.
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+Several functions now return False due to the feature being depreciated in the past.  These include import/export of CSV data from frames, sync actions with csv data, frame grids, create_objects and update_objects (notice the plural). object_path always returns an empty string since Pairtree storage is no longer the default and will be phased out.
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+In the future additional support is planned to wrap the Dataset JSON API web service like was implemented in [ts_dataset](https://github.com/caltechlibrary/ts_dataset).
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