Episode guest_stars collection is not returned #126
Description
For each TV Episode there is a Guest Star array that is not returned by the Episodes->getCredits() function.
It seems that the guest star class is missing so when the api returns that collection the json_decode function cannot find an appropriate class to cast it.
Steps to reproduce:
Execute the getCredits() function in the Episodes repository and pass the following parameters
tv_id = 1402
season_number = 1
episode_number = 5
The collection does not have a guest_stars collection.
If you execute the same query to the Movie DB api (https://developers.themoviedb.org/3/tv-episodes/get-tv-episode-credits) you will see that there is a guest_stars collection of credits