Adding invert implementation

Config/thumbnails.php

@@ -31,12 +31,13 @@ return [
 //        'gamma' => [
 //            'correction' => '1.8'
 //        ],
-//          'greyscale' => [],
-          'heighten' => [
-              'height' => 500,
-              'callback' => function($constraint) {
-                  $constraint->upsize();
-              }
-          ]
+//         'greyscale' => [],
+//         'heighten' => [
+//             'height' => 500,
+//             'callback' => function($constraint) {
+//                 $constraint->upsize();
+//             }
+//         ]
+           'invert' => [],
     ]
 ];

Image/Intervention/Manipulations/Invert.php

+<?php namespace Modules\Media\Image\Intervention\Manipulations;
+
+use Modules\Media\Image\ImageHandlerInterface;
+
+class Invert implements ImageHandlerInterface
+{
+    /**
+     * Handle the image manipulation request
+     * @param \Intervention\Image\Image $image
+     * @param array $options
+     * @return \Intervention\Image\Image
+     */
+    public function handle($image, $options)
+    {
+        return $image->invert();
+    }
+}