(temporary) fix for wrong date/time stamps in monitor.csv
See this issue: [date/timestamp sometimes wrong, old date/timestamp, while the longitude/latitude has been changed #234] (Hyundai-Kia-Connect/hyundai_kia_connect_api#234)
Compute the newest date from:
- vehicle.last_updated_at
- vehicle._location_last_set_time
Other fix: write the EV range without decimal point.