Merge pull request #13 from sanmai/pipelinev1

Preparing to upgrade the pipeline to v.2

src/LazyLINQ/Collection.php

@@ -33,7 +33,7 @@ class Collection implements Interfaces\Collection
      *
      * @param \Traversable|null $input
      *
-     * @deprecated
+     * @private
      */
     public function __construct(\Traversable $input = null)
     {
@@ -59,7 +59,7 @@ public static function from($source, ...$args)
 
     private function replace(callable $func)
     {
-        $this->pipeline->map(static::from($func, clone $this->pipeline)->pipeline);
+        $this->pipeline = new \Pipeline\Standard($func($this->pipeline));
 
         return $this;
     }