Add subclass to next_session_times

[Esterni]

The attribute 26 "raceWeekCars" is actually a dictionary of car_ids
example from season 2865:
{"110":{"maxPctFuelFill":"","weightPenaltyKG":"","max_dry_tire_sets":3,"powerAdjustPct":""},"56":{"maxPctFuelFill":"","weightPenaltyKG":"","max_dry_tire_sets":3,"powerAdjustPct":""},"103":{"maxPctFuelFill":"","weightPenaltyKG":"","max_dry_tire_sets":3,"powerAdjustPct":""}}

[stucharo]

There's something odd happening in next_session_times() where response.json()["d"] returns an empty list (rather than the expected dict)for some series. So far it looks like this happens on:

2720 : eNASCAR Coca-Cola Series
2861 : iRacing Endurance Le Mans Series
2721 : NASCAR Road to Pro
2811 : Nurburgring Endurance Championship
2817 : Porsche Esports Sprint Challenge
2812 : Porsche TAG Heuer Esports Supercup
2908 : WoO Late Model WC Series

Has this behaviour been noticed before? Any ideas why it would happen on those particular series? I'll try and have a closer look later if we don't have any more insight yet.

Edit: Nevermind, it's series with no upcoming sessions. I'll modify the client to check this condition.

[Esterni]

It's interesting that it doesn't provide what the next session would be, even if it's further into the future.

It might be good to log a response that no sessions were detected, which usually indicates a series that has sessions spread far apart.