test: skip test-icu-transcode if Intl is not present

use common.hasIntl to make sure Intl object is present or not.

PR-URL: nodejs#10707
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Italo A. Casas <me@italoacasas.com>
Reviewed-By: Steven R Loomis <srloomis@us.ibm.com>

test/parallel/test-icu-transcode.js

@@ -1,9 +1,14 @@
 'use strict';
 
-require('../common');
+const common = require('../common');
 const buffer = require('buffer');
 const assert = require('assert');
 
+if (!common.hasIntl) {
+  common.skip('icu punycode tests because ICU is not present.');
+  return;
+}
+
 const orig = Buffer.from('tést €', 'utf8');
 
 // Test Transcoding