[squash] move away from for-const-of loop

Author: addaleax

lib/internal/wrap_js_stream.js

@@ -145,8 +145,8 @@ class JSStreamWrap extends Socket {
     let pending = bufs.length;
 
     this.stream.cork();
-    for (const buf of bufs)
-      this.stream.write(buf, done);
+    for (var i = 0; i < bufs.length; ++i)
+      this.stream.write(bufs[i], done);
     this.stream.uncork();
 
     function done(err) {