Incremental mode duplicates last record (deals)

[slumbi]

In case of deals (but I think it is true for other entities as well):
When running the tap with a state file, comparison based on hs_lastmodifieddate is buggy, and the last record of the previous execution is exported again during the next execution.
I think the culprit is in this line :

            if not modified_time or modified_time >= start:
                record = bumble_bee.transform(lift_properties_and_versions(row), schema, mdata)
                singer.write_record("deals", record, catalog.get('stream_alias'), time_extracted=utils.now())

I guess modified_time should be strictly greater ( > ) than start in order to not write out again the same record.