Adding heighten implementation

Config/thumbnails.php

@@ -31,6 +31,12 @@ return [
 //        'gamma' => [
 //            'correction' => '1.8'
 //        ],
-          'greyscale' => [],
+//          'greyscale' => [],
+          'heighten' => [
+              'height' => 500,
+              'callback' => function($constraint) {
+                  $constraint->upsize();
+              }
+          ]
     ]
 ];

Image/Intervention/Manipulations/Heighten.php

+<?php namespace Modules\Media\Image\Intervention\Manipulations;
+
+use Modules\Media\Image\ImageHandlerInterface;
+
+class Heighten implements ImageHandlerInterface
+{
+    private $defaults = [
+        'height' => 0,
+    ];
+
+    /**
+     * Handle the image manipulation request
+     * @param \Intervention\Image\Image $image
+     * @param array $options
+     * @return \Intervention\Image\Image
+     */
+    public function handle($image, $options)
+    {
+        $options = array_merge($this->defaults, $options);
+
+        $callback = isset($options['callback']) ? $options['callback'] : null;
+
+        return $image->heighten($options['height'], $callback);
+    }
+}