node tests: Use zrequire in compose_fade.js.

frontend_tests/node_tests/compose_fade.js

@@ -1,13 +1,10 @@
 set_global('$', function () {
 });
 
-add_dependencies({
-    people: 'js/people',
-    stream_data: 'js/stream_data',
-    util: 'js/util',
-});
-
-var compose_fade = require('js/compose_fade.js');
+zrequire('util');
+zrequire('stream_data');
+zrequire('people');
+zrequire('compose_fade');
 
 var me = {
     email: 'me@example.com',