feat: make StatusCode::as_u16 a const fn (#680)

Author: WhyNotHugo

src/status.rs

@@ -116,8 +116,8 @@ impl StatusCode {
     /// assert_eq!(status.as_u16(), 200);
     /// ```
     #[inline]
-    pub fn as_u16(&self) -> u16 {
-        (*self).into()
+    pub const fn as_u16(&self) -> u16 {
+        (*self).0.get()
     }
 
     /// Returns a &str representation of the `StatusCode`

src/uri/port.rs

@@ -22,7 +22,7 @@ impl<T> Port<T> {
     /// let port = authority.port().unwrap();
     /// assert_eq!(port.as_u16(), 80);
     /// ```
-    pub fn as_u16(&self) -> u16 {
+    pub const fn as_u16(&self) -> u16 {
         self.port
     }
 }