Merge pull request #27 from Bl00D4NGEL/fix/generic-return-type-hint

fix: Add T as a possible return type for lastOr and firstOr

Author: Dominik Peters

src/Domain/Collection.php

@@ -200,7 +200,7 @@ public function first(callable $callback = null)
      * @template U of T|mixed
      * @param ?callable(T, int, static): bool $callback
      * @param U $fallbackValue
-     * @return U
+     * @return U|T
      * @throws InvalidArgumentException
      */
     public function firstOr(callable $callback = null, mixed $fallbackValue = null)
@@ -250,7 +250,7 @@ public function last(callable $callback = null)
      * @template U of T|mixed
      * @param ?callable(T, int, static): bool $callback
      * @param U $fallbackValue
-     * @return U
+     * @return U|T
      * @throws InvalidArgumentException
      */
     public function lastOr(callable $callback = null, mixed $fallbackValue = null)