v0.9.2

Thanks to the following for their contributions:

• @acdenisSK

Changed

• [misc] Update the version in lib.rs to rely on any patch version in 0.9 (@acdenisSK) c:85e5722
• [misc] Credit the real author of the Serenity.await commit (@acdenisSK) c:757e0d6

Fixed

• [framework] Avoid cloning the entire guild object upon a command invocation (@acdenisSK) c:bc78991
• [model] Only add roles that the member does not possess when calling Member::add_roles (@acdenisSK) c:e6fd09b