Update v1.13.0-f8:

Changes:
Lowered metro track upkeep cost.

Fixed:
IsIntercity error caused by custom stations.
Medium Road Bridge Trolleybus and Medium Road Elevated Trolleybus not attaching properly to the overhead wire poles.
Trolleybuses ignoring the stop signs.
Match day, Varsity Sport arenas and Festival Area missing an event audio.
Issue with creating metro lines to bus-metro hub's lower metro station in certain cases.