Adding gamma implementation

Config/thumbnails.php

@@ -25,8 +25,11 @@ return [
 //        'contrast' => [
 //            'level' => 65
 //        ],
-        'flip' => [
-            'mode' => 'h'
+//        'flip' => [
+//            'mode' => 'h'
+//        ],
+        'gamma' => [
+            'correction' => '1.8'
         ],
     ]
 ];

Image/Intervention/Manipulations/Gamma.php

+<?php namespace Modules\Media\Image\Intervention\Manipulations;
+
+use Modules\Media\Image\ImageHandlerInterface;
+
+class Gamma implements ImageHandlerInterface
+{
+    private $defaults = [
+        'correction' => 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);
+
+        return $image->gamma($options['correction']);
+    }
+}