Fixed empty mention array
Created by: Lachee
Summary
Mentionables failed to account for empty arrays. In this situation, it should ping nothing.
Details
An additional check has been placed when creating the mentionable payload to add a empty Parse array when there is no items in the IEnumerable
Notes
I have tested it and it works as expected. The test command D# mention @user
has been updated to indicate when it should ping and when it shouldn't.