feat(types): Added Rfc1123 String type, useful for k8s names

harmony_types/src/rfc1123.rs

@@ -158,13 +158,10 @@ mod tests {
         assert_eq!(name.content, "hello");
     }
 
+    #[test]
     fn test_try_from_single_hyphen() {
-        let name = Rfc1123Name::try_from("-").unwrap();
-        assert!(name.content.is_empty());
-        // TODO this test should not pass, empty string is not rfc 1123 compliant
-        // We have to refactor and replace convert with try_from and return Err when string turns
-        // out empty
-        assert_eq!(name.content, "");
+        let name = Rfc1123Name::try_from("-");
+        assert!(name.is_err());
     }
 
     #[test]