Update Request.php fix explicit nullable php 8.4 (#27)

* Update Request.php fix explicit nullable php 8.4

* Update Response.php fix explicit nullable php 8.4

* Update Headers.php fix explicit nullable php 8.4

Author: joanhey

src/Headers.php

@@ -22,7 +22,7 @@ class Headers
      *
      * @param int|null $httpCode The current response code.
      */
-    public static function status(int $httpCode = null)
+    public static function status(?int $httpCode = null)
     {
         if ($httpCode === null) return self::$httpCode;
         self::$httpCode = $httpCode;

src/Request.php

@@ -234,7 +234,7 @@ public static function get($params, bool $safeData = true)
      *
      * @return mixed
      */
-    public static function params(string $key = null, $default = null)
+    public static function params(?string $key = null, $default = null)
     {
         return static::get($key) ?? $default;
     }
@@ -250,7 +250,7 @@ public static function params(string $key = null, $default = null)
      *
      * @return mixed
      */
-    public static function getOrDefault(string $key = null, $default = null)
+    public static function getOrDefault(?string $key = null, $default = null)
     {
         return static::get($key) ?? $default;
     }
@@ -300,7 +300,7 @@ public static function files($filenames = null)
      * @param string|null $key
      * @return array|string|null
      */
-    public static function cookies(string $key = null)
+    public static function cookies(?string $key = null)
     {
         return $key === null ?
             Cookie::all() :

src/Response.php

@@ -186,7 +186,7 @@ public function markup(string $markup, int $code = 200)
      * @param string|null $name The of the file as shown to user
      * @param int $code The response status code
      */
-    public function download(string $file, string $name = null, int $code = 200)
+    public function download(string $file, ?string $name = null, int $code = 200)
     {
         $this->status = $code;
 
@@ -356,7 +356,7 @@ public function withHeader($name, ?string $value = '', bool $replace = true, int
      *
      * @return Response
      */
-    public function withCookie(string $name, string $value, int $expire = null): Response
+    public function withCookie(string $name, string $value, ?int $expire = null): Response
     {
         $this->cookies[$name] = [$value, $expire ?? (time() + 604800)];