test: fix dangerous .map in test/parallel/test-http-set-trailers.js

PR-URL: #43087 Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Michaël Zasso <[email protected]> Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Zeyu "Alex" Yang <[email protected]> Reviewed-By: Tobias Nießen <[email protected]>

Author: LiviaMedeiros

test/parallel/test-http-set-trailers.js

@@ -96,7 +96,7 @@ const server = http.createServer((req, res) =>{
 });
 server.listen(0,()=>{
 Promise.all([testHttp10,testHttp11,testClientTrailers]
-.map(util.promisify)
+.map((f)=>util.promisify(f))
 .map((f)=>f(server.address().port)))
 .then(()=>server.close());
 });