test: modernize test-crypto-domain

PR-URL: #23559
Reviewed-By: Sam Ruby <rubys@intertwingly.net>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

test/parallel/test-crypto-domain.js

@@ -28,7 +28,7 @@ const assert = require('assert');
 const crypto = require('crypto');
 const domain = require('domain');
 
-function test(fn) {
+const test = (fn) => {
  const ex = new Error('BAM');
  const d = domain.create();
  d.on('error', common.mustCall(function(err) {
@@ -38,7 +38,7 @@ function test(fn) {
  throw ex;
  });
  d.run(cb);
-}
+};
 
 test(function(cb) {
  crypto.pbkdf2('password', 'salt', 1, 8, cb);