Accidentally removed lowercasing

src/lib.rs

                 if word.is_some() {
                     let mut word = word.unwrap().to_string();
                     word.truncate(word.len() - 2);
-                    domain = format!("{}.{}", word, tld);
+                    domain = format!("{}.{}", word.to_lowercase(), tld);
                 }
             });
         }