fix: only push a record if we have a content response

src/resolver.ts

@@ -93,11 +93,13 @@ export default class Eth extends AbstractResolverModule {
         return resolverError(e);
       }
 
+      if (content) {
         records.push({
           type: DNS_RECORD_TYPE.CONTENT,
           value: `${content.protocolType}://${content.decoded}` as string,
         });
       }
+    }
 
     if ([DNS_RECORD_TYPE.CUSTOM].includes(options.type)) {
       let text;