chore: add eslint rules

api/services/dns.ts

@@ -10,7 +10,10 @@ function resolvePromise(hostname: string): Promise<string[]> {
   });
 }
 
-export default async function handler(req: NowRequest, res: NowResponse) {
+export default async function handler(
+  req: NowRequest,
+  res: NowResponse,
+): Promise<void> {
   const {query} = req.query;
 
   if (!query) {