feat: add new MessageFlags.FLAGS & User#system (#3603)

* feat: add new FLAGS

* feat: add system property

* typings: add User#system & new MessageFlagsStrings

src/structures/User.js

@@ -59,6 +59,13 @@ class User extends Base {
 
     if (typeof data.bot !== 'undefined') this.bot = Boolean(data.bot);
 
+    /**
+     * Whether the user is an Official Discord System user (part of the urgent message system)
+     * @type {?boolean}
+     * @name User#system
+     */
+    if (typeof data.system !== 'undefined') this.system = Boolean(data.system);
+
     /**
      * The locale of the user's client (ISO 639-1)
      * @type {?string}

src/util/MessageFlags.js

@@ -13,6 +13,8 @@ class MessageFlags extends BitField {}
  * * `CROSSPOSTED`
  * * `IS_CROSSPOST`
  * * `SUPPRESS_EMBEDS`
+ * * `SOURCE_MESSAGE_DELETED`
+ * * `URGENT`
  * @type {Object}
  * @see {@link https://discordapp.com/developers/docs/resources/channel#message-object-message-flags}
  */
@@ -20,6 +22,8 @@ MessageFlags.FLAGS = {
   CROSSPOSTED: 1 << 0,
   IS_CROSSPOST: 1 << 1,
   SUPPRESS_EMBEDS: 1 << 2,
+  SOURCE_MESSAGE_DELETED: 1 << 3,
+  URGENT: 1 << 4,
 };
 
 module.exports = MessageFlags;

typings/index.d.ts

@@ -1403,6 +1403,7 @@ declare module 'discord.js' {
 		public locale: string;
 		public readonly partial: false;
 		public readonly presence: Presence;
+		public system?: boolean;
 		public readonly tag: string;
 		public username: string;
 		public avatarURL(options?: AvatarOptions): string | null;
@@ -1922,7 +1923,9 @@ declare module 'discord.js' {
 
 	type MessageFlagsString = 'CROSSPOSTED'
 		| 'IS_CROSSPOST'
-		| 'SUPPRESS_EMBEDS';
+		| 'SUPPRESS_EMBEDS'
+		| 'SOURCE_MESSAGE_DELETED'
+		| 'URGENT';
 
 	interface APIErrror {
 		UNKNOWN_ACCOUNT: number;