Add DiscordOverwrite.GetMemberAsync and GetRoleAsync
Created by: uwx
Summary
Adds convenience methods for getting the Member or Role affected by a permission overwrite.
Details
The current implementation of these methods is a hack, since DiscordOverwrite does not provide the guild's ID, only the channel ID. This could be changed in future if a new property was to be introduced.
Changes proposed
- Add DiscordOverwrite.GetMemberAsync
- Add DiscordOverwrite.GetRoleAsync