Ignore case when looking up by prefix

src/lib.rs

@@ -25,7 +25,7 @@ pub fn guild_by_prefix(prefix: &str) -> Result<Option<GuildEntry>, Box<Error>> {
 	let top_100 = guild_leaderboard()?;
 
 	for guild in top_100.data.into_iter() {
-		if guild.prefix == prefix {
+		if guild.prefix.to_ascii_lowercase() == prefix.to_ascii_lowercase() {
 			return Ok(Some(guild));
 		}
 	}