fix(esm): add missing exports (#4911)

Author: vaporoxx

esm/discord.mjs

@@ -25,6 +25,7 @@ export const {
   SnowflakeUtil,
   Structures,
   SystemChannelFlags,
+  UserFlags,
   Util,
   version,
   ChannelManager,
@@ -34,6 +35,7 @@ export const {
   GuildMemberManager,
   GuildMemberRoleManager,
   GuildManager,
+  ReactionManager,
   ReactionUserManager,
   MessageManager,
   PresenceManager,
@@ -45,9 +47,11 @@ export const {
   resolveColor,
   resolveString,
   splitMessage,
+  Application,
   Base,
   Activity,
   APIMessage,
+  BaseGuildEmoji,
   CategoryChannel,
   Channel,
   ClientApplication,
@@ -60,6 +64,7 @@ export const {
   GuildChannel,
   GuildEmoji,
   GuildMember,
+  GuildPreview,
   Integration,
   Invite,
   Message,