fix(PresenceUpdate): correctly add user regardless of their properties (

#10672)

* fix(PresenceUpdate): correctly add user regardless of their properties

* refactor(PresenceUpdate): reflect partials

* refactor(PresenceUpdate): prettier

* refactor(PresenceUpdate): add import

---------

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

packages/discord.js/src/client/actions/PresenceUpdate.js

@@ -2,11 +2,14 @@
 
 const Action = require('./Action');
 const Events = require('../../util/Events');
+const Partials = require('../util/Partials');
 
 class PresenceUpdateAction extends Action {
   handle(data) {
     let user = this.client.users.cache.get(data.user.id);
-    if (!user && data.user.username) user = this.client.users._add(data.user);
+    if (!user && ('username' in data.user || this.client.options.partials.includes(Partials.User))) {
+      user = this.client.users._add(data.user);
+    }
     if (!user) return;
 
     if (data.user.username) {