docs/typings(VoiceStateStore): document and type the class (#3294)

* Update index.d.ts

* Update Guild.js

* Update Guild.js

* docs/typings(VoiceStateStore): document and add typings

src/stores/VoiceStateStore.js

@@ -3,6 +3,10 @@
 const DataStore = require('./DataStore');
 const VoiceState = require('../structures/VoiceState');
 
+/**
+ * Stores voice states.
+ * @extends {DataStore}
+ */
 class VoiceStateStore extends DataStore {
   constructor(guild, iterable) {
     super(guild.client, iterable, VoiceState);

src/structures/Guild.js

@@ -57,6 +57,10 @@ class Guild extends Base {
      */
     this.presences = new PresenceStore(this.client);
 
+    /**
+     * A collection of voice states in this guild
+     * @type {VoiceStateStore<Snowflake, VoiceState>}
+     */
     this.voiceStates = new VoiceStateStore(this);
 
     /**

typings/index.d.ts

@@ -469,6 +469,7 @@ declare module 'discord.js' {
 		public verificationLevel: number;
 		public readonly verified: boolean;
 		public readonly voice: VoiceState | null;
+		public readonly voiceStates: VoiceStateStore;
 		public readonly widgetChannel: TextChannel | null;
 		public widgetChannelID: Snowflake | null;
 		public widgetEnabled: boolean | null;
@@ -1542,6 +1543,10 @@ declare module 'discord.js' {
 		public fetch(id: Snowflake, cache?: boolean): Promise<User>;
 	}
 
+	export class VoiceStateStore extends DataStore<Snowflake, VoiceState, typeof VoiceState> {
+		constructor(guild: Guild, iterable?: Iterable<any>);
+	}
+
 //#endregion
 
 //#region Mixins