Update nullables

src/CasesCollection.php

@@ -112,10 +112,10 @@ public function toArray(): array
     /**
      * Retrieve the first case.
      *
-     * @param (callable(TValue, array-key): bool)|null $callback
+     * @param ?callable(TValue, array-key): bool $callback
      * @return ?TValue
      */
-    public function first(callable|null $callback = null): mixed
+    public function first(?callable $callback = null): mixed
     {
         $callback ??= fn() => true;
 

src/Concerns/CollectsCases.php

@@ -30,9 +30,9 @@ public static function count(): int
     /**
      * Retrieve the first case.
      *
-     * @param (callable(self, array-key): bool)|null $callback
+     * @param ?callable(self, array-key): bool $callback
      */
-    public static function first(callable|null $callback = null): ?self
+    public static function first(?callable $callback = null): ?self
     {
         return self::collect()->first($callback);
     }