fix: member.joinedAt can be undefined

src/structures/guild.ts

@@ -373,7 +373,7 @@ export interface DiscordenoGuild extends
   bot?: DiscordenoMember;
   /** The bot guild member in this guild if cached */
   botMember?: Omit<GuildMember, "joinedAt" | "premiumSince" | "roles"> & {
-    joinedAt: number;
+    joinedAt?: number;
     premiumSince?: number;
     roles: bigint[];
   };

src/structures/message.ts

@@ -300,7 +300,7 @@ export interface DiscordenoMessage extends
   member?: DiscordenoMember;
   /** The guild member details for this guild and member. Can be undefined if not in cache or in dm. */
   guildMember?: Omit<GuildMember, "joinedAt" | "premiumSince" | "roles"> & {
-    joinedAt: number;
+    joinedAt?: number;
     premiumSince?: number;
     roles: bigint[];
   };

src/structures/voice_state.ts

@@ -116,7 +116,7 @@ export interface DiscordenoVoiceState
   // GETTERS
   member: DiscordenoMember;
   guildMember?: Omit<GuildMember, "joinedAt" | "premiumSince" | "roles"> & {
-    joinedAt: number;
+    joinedAt?: number;
     premiumSince?: number;
     roles: bigint[];
   };