test: using arrow functions

 - Using arrow functions in test-tls-client-resume.js
- Fixed error, Expected parentheses around arrow function
argument arrow-parens
PR-URL: #24436
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: NoSkillGirl

test/parallel/test-tls-client-resume.js

@@ -38,7 +38,7 @@ const options = {
 };
 
 // create server
-constserver=tls.Server(options,common.mustCall(function(socket){
+constserver=tls.Server(options,common.mustCall((socket)=>{
 socket.end('Goodbye');
 },2));
 
@@ -49,13 +49,13 @@ server.listen(0, function() {
 constclient1=tls.connect({
 port: this.address().port,
 rejectUnauthorized: false
-},function(){
+},()=>{
 console.log('connect1');
 assert.ok(!client1.isSessionReused(),'Session *should not* be reused.');
 session1=client1.getSession();
 });
 
-client1.on('close',function(){
+client1.on('close',()=>{
 console.log('close1');
 
 constopts={
@@ -64,12 +64,12 @@ server.listen(0, function() {
 session: session1
 };
 
-constclient2=tls.connect(opts,function(){
+constclient2=tls.connect(opts,()=>{
 console.log('connect2');
 assert.ok(client2.isSessionReused(),'Session *should* be reused.');
 });
 
-client2.on('close',function(){
+client2.on('close',()=>{
 console.log('close2');
 server.close();
 });