Add generics annotations for better IDE support

Author: Arkemlar

src/Pagination/LengthAwarePaginator.php

@@ -6,7 +6,6 @@
 use Illuminate\Contracts\Support\Arrayable;
 use Illuminate\Support\Collection;
 use JsonSerializable;
-use Psalm\Type\Atomic\TValueOf;
 
 /**
  * @template TKey of array-key