Fix types

src/models/reminder/builder.rs

@@ -55,7 +55,7 @@ pub struct ReminderBuilder {
     tts: bool,
     attachment_name: Option<String>,
     attachment: Option<Vec<u8>>,
-    set_by: Option<u32>,
+    set_by: Option<u64>,
 }
 
 impl ReminderBuilder {
@@ -132,7 +132,7 @@ pub struct MultiReminderBuilder<'a> {
     interval: Option<Interval>,
     expires: Option<NaiveDateTime>,
     content: Content,
-    set_by: Option<u32>,
+    set_by: Option<u64>,
     ctx: &'a Context<'a>,
     guild_id: Option<GuildId>,
 }