Support upcoming guild ownership transfership change.
Support upcoming guild ownership transfership change.

Thanks to Jake.

Rapptz/discord.py,khazhyk/discord.py,lgkern/PriestPy,Theoretical/UselessBot,jhgg/discord.py,rapptz/discord.py,imayhaveborkedit/discord.py,Harmon758/discord.py,mgardne8/discord.py,variablehair/Eggplantato,Harmon758/discord.py