test: replace foreach with for of

PR-URL: #50790
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

test/parallel/test-stream2-transform.js

@@ -413,11 +413,11 @@ const { PassThrough, Transform } = require('stream');
     ended = true;
   });
 
-  objects.forEach(function(obj) {
+  for (const obj of objects) {
     jp.write(JSON.stringify(obj));
     const res = jp.read();
     assert.deepStrictEqual(res, obj);
-  });
+  }
 
   jp.end();
   // Read one more time to get the 'end' event
@@ -454,11 +454,11 @@ const { PassThrough, Transform } = require('stream');
     ended = true;
   });
 
-  objects.forEach(function(obj) {
+  for (const obj of objects) {
     js.write(obj);
     const res = js.read();
     assert.strictEqual(res, JSON.stringify(obj));
-  });
+  }
 
   js.end();
   // Read one more time to get the 'end' event