1.2.3.0

Fixes a bug when aggregating data on a GroupedTableAppenderResponse when one of the non aggregated columns is NULL. The old behavior was to match old and new data comparing with the "=" operator, but NULL is notoriously equal to nothing, so whenever NULL was present in one of the non aggregated columns, a new row with the same exact data was added to the target table. The new behavior is to match on
''' sql
(src.column = dest.column OR ( src.column IS NULL AND dest.column IS NULL ))
'''