Some channels return "room_mods" even when there's no moderators.

[Ravenbtw]

Actual behaviour:
It gives an error. IRC returns "The moderators of this channel are:" and nothing else.

Expected behaviour:
It returns an empty array or says there's no moderators.

Error log:

const mods = msg.split(': ')[1].toLowerCase()
                                              ^
TypeError: Cannot read property 'toLowerCase' of undefined

Server configuration

• tmi.js version: 1.8.3

[Ravenbtw]

Might wanna add a check to see if "msg.split(': ')[1]" exists on line 285.