add categories and callsign to get_flights

[Andrechang]

add categories filter for get flights #42

[JeanExtreme002]

Hi, @Andrechang!

First of all, thank you for your contribution! I tested the category filter, but it doesn’t seem to be working.

fr_api.get_flights(categories="H")  # It is also returning aircrafts and balls,,,

Could you please confirm this feature?

[Andrechang]

Hi, @JeanExtreme002

you are right. strange it doesnt follow this https://fr24api.flightradar24.com/docs#flights ?

but callsigns works, is ok to keep that addition ? flights = fr_api.get_flights(callsigns="VXP176")