Fix: Client#guilds has no guilds on "ready" event

The "ready" event was sent before Client#guilds being updated, that is because we did not await the method to getUserGuilds to optimize connection latency, though it is no longer necessary as it is only the connection process taking a small additional time and TouchGuild is recognized to be blazing fast enough to handle this properly without feeling "slow".

lib/structures/Client.ts

@@ -189,10 +189,10 @@ export class Client extends TypedEmitter<ClientEvents> {
     connect(): void {
         void this.checkForUpdate();
         this.ws.connect();
-        this.ws.on("GATEWAY_WELCOME", data => {
+        this.ws.on("GATEWAY_WELCOME", async data => {
             this.user = new UserClient(data, this);
             if (this.params.connectionMessage) console.log("> Connection established.");
-            void this.rest.misc.getUserGuilds("@me").catch(() => [])
+            await this.rest.misc.getUserGuilds("@me").catch(() => [])
                 .then(guilds => {
                     if (!guilds) guilds = [];
                     for (const guild of guilds) this.guilds.add(guild);