dgram: use simplified validator

The `dgram` lib module should use the simplified `validatePort()`
validator.

PR-URL: #39753
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Zijian Liu <lxxyxzj@gmail.com>

lib/dgram.js

@@ -369,7 +369,7 @@ Socket.prototype.bind = function(port_, address_ /* , callback */) {
 };
 
 Socket.prototype.connect = function(port, address, callback) {
-  port = validatePort(port, 'Port', { allowZero: false });
+  port = validatePort(port, 'Port', false);
   if (typeof address === 'function') {
     callback = address;
     address = '';
@@ -626,7 +626,7 @@ Socket.prototype.send = function(buffer,
   }
 
   if (!connected)
-    port = validatePort(port, 'Port', { allowZero: false });
+    port = validatePort(port, 'Port', false);
 
   // Normalize callback so it's either a function or undefined but not anything
   // else.