Fix test snapshots

tests/API/Kitsu/Transformer/__snapshots__/AnimeListTransformerTest__testTransform__1.php

@@ -16,10 +16,7 @@
    'anime' => 
   Aviat\AnimeClient\Types\Anime::__set_state(array(
      'age_rating' => NULL,
-     'age_rating_guide' => NULL,
      'cover_image' => 'https://media.kitsu.io/anime/poster_images/12243/small.jpg?1481144116',
-     'episode_count' => NULL,
-     'episode_length' => NULL,
      'genres' => 
     array (
       0 => 'Comedy',
@@ -27,22 +24,17 @@
       2 => 'Slice of Life',
     ),
      'id' => '12243',
-     'included' => NULL,
      'show_type' => 'TV',
      'slug' => 'kobayashi-san-chi-no-maid-dragon',
-     'status' => NULL,
      'streaming_links' => 
     array (
     ),
-     'synopsis' => NULL,
      'title' => 'Kobayashi-san Chi no Maid Dragon',
      'titles' => 
     array (
       0 => 'Miss Kobayashi\'s Dragon Maid',
       1 => '小林さんちのメイドラゴン',
     ),
-     'trailer_id' => NULL,
-     'url' => NULL,
   )),
    'watching_status' => 'current',
    'notes' => NULL,

tests/API/Kitsu/Transformer/__snapshots__/AnimeListTransformerTest__testUntransform with data set #2__1.php

@@ -6,7 +6,6 @@
      'notes' => '',
      'private' => true,
      'progress' => 12,
-     'rating' => NULL,
      'reconsumeCount' => 0,
      'reconsuming' => true,
      'status' => 'current',

tests/API/Kitsu/Transformer/__snapshots__/AnimeTransformerTest__testTransform__1.php

@@ -8,7 +8,6 @@
   array (
   ),
    'id' => 32344,
-   'included' => NULL,
    'show_type' => 'TV',
    'slug' => 'attack-on-titan',
    'status' => 'Finished Airing',

tests/API/Kitsu/Transformer/__snapshots__/MangaTransformerTest__testTransform__1.php

@@ -6,7 +6,6 @@
   array (
   ),
    'id' => '20286',
-   'included' => NULL,
    'jp_title' => 'Bokura wa Minna Kawaisou',
    'manga_type' => 'manga',
    'synopsis' => 'Usa, a high-school student aspiring to begin a bachelor lifestyle, moves into a new apartment only to discover that he not only shares a room with a perverted roommate that has an obsession for underaged girls, but also that another girl, Ritsu, a love-at-first-sight, is living in the same building as well!