Fixed RequireBotPermissions attribute.
Created by: Kiritsu
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Summary
It should fix the RequireBotPermissions attribute when you put at least 2 permissions. Before the change, if the bot had one of the permissions put in the attribute, the precondition would pass.
Details
if ((pbot & this.Permissions) != 0)
became
if ((pbot & this.Permissions) == this.Permissions)
It was already fixed in RequirePermissionsAttribute and RequireUserPermissionsAttribute.