fix(validate, http): use smaller and unsigned integer for get-pins limit (#2477)

Author: Erk-

twilight-http/src/request/channel/get_pins.rs

@@ -13,7 +13,7 @@ use twilight_validate::request::{ValidationError, pin_limit as validate_pin_limi
 
 pub struct GetPinsQueryFields {
     before: Option<Timestamp>,
-    limit: Option<i32>,
+    limit: Option<u16>,
 }
 
 /// Get the pins of a channel.
@@ -54,7 +54,7 @@ impl<'a> GetPins<'a> {
     /// [docs]
     ///
     /// [docs]: https://discord.com/developers/docs/resources/message#get-channel-pins-query-string-params
-    pub fn limit(mut self, limit: i32) -> Self {
+    pub fn limit(mut self, limit: u16) -> Self {
         self.fields = self.fields.and_then(|mut fields| {
             validate_pin_limit(limit)?;
 

twilight-http/src/routing.rs

@@ -802,7 +802,7 @@ pub enum Route<'a> {
         /// The ID of the channel.
         channel_id: u64,
         /// Optionally the limit of pins to show in the response. (1-50) (default: 50)
-        limit: Option<i32>,
+        limit: Option<u16>,
         /// Optionally the timestamp as a filter to only show pins before the provided timestamp.
         before: Option<String>,
     },

twilight-validate/src/request.rs

@@ -129,10 +129,10 @@ pub const NICKNAME_LIMIT_MAX: usize = 32;
 pub const NICKNAME_LIMIT_MIN: usize = 1;
 
 /// Maximum pin limit.
-pub const PIN_LIMIT_MAX: i32 = 50;
+pub const PIN_LIMIT_MAX: u16 = 50;
 
 /// Minimum pin limit.
-pub const PIN_LIMIT_MIN: i32 = 1;
+pub const PIN_LIMIT_MIN: u16 = 1;
 
 /// Maximum length of a scheduled event's description.
 pub const SCHEDULED_EVENT_DESCRIPTION_MAX: usize = 1000;
@@ -714,7 +714,7 @@ pub enum ValidationErrorType {
     /// Provided pin limit was invalid.
     Pin {
         /// Invalid limit.
-        limit: i32,
+        limit: u16,
     },
     /// Scheduled event description is invalid.
     ScheduledEventDescription {
@@ -1510,7 +1510,7 @@ pub fn nickname(nickname: impl AsRef<str>) -> Result<(), ValidationError> {
 ///
 /// [`Pin`]: ValidationErrorType::Pin
 /// [pin limit]: https://discord.com/developers/docs/resources/message#get-channel-pins-query-string-params
-pub fn pin_limit(limit: i32) -> Result<(), ValidationError> {
+pub fn pin_limit(limit: u16) -> Result<(), ValidationError> {
     if (PIN_LIMIT_MIN..=PIN_LIMIT_MAX).contains(&limit) {
         Ok(())
     } else {