Merge pull request 'add alias toilet to flush' (#3) from flush-alias into daddy

Reviewed-on: https://git.ablecorp.us:443/elfein/mpsc_bot/pulls/3

src/commands.rs

@@ -319,6 +319,7 @@ async fn clean(ctx: &Context, msg: &Message) -> CommandResult {
 #[command]
 #[only_in(guilds)]
 #[owners_only]
+#[aliases("toilet")]
 #[usage("flush")]
 /// Deletes all messages sent by this bot.
 async fn flush(ctx: &Context, msg: &Message) -> CommandResult {