Cjbenavides88 fetch media item comments (#102)

Created function to fetch comments from a media item.

README.md

@@ -67,6 +67,12 @@ To fetch the user information data you may use the `self()` method.
 $instagram->self();
 ```
 
+To [fetch media item comments](https://www.instagram.com/developer/endpoints/comments/#get_media_comments) you may use the `comments()` method.
+
+```php
+$instagram->comments('20033001112203311302_0102938816');
+```
+
 > **Note:** You can only fetch a user's recent media from the given access token.
 
 ## Rate Limiting

src/Instagram.php

@@ -83,6 +83,20 @@ public function media(array $parameters = []): array
         return $response->data;
     }
 
+    /**
+     * Fetch comments from media item.
+     *
+     * @param string $mediaId
+     *
+     * @return array
+     */
+    public function comments(string $mediaId) : array
+    {
+        $response = $this->get('media/'.$mediaId.'/comments');
+
+        return $response->data;
+    }
+
     /**
      * Fetch user information.
      *

tests/InstagramTest.php

@@ -43,6 +43,31 @@ public function testMedia()
         $this->assertCount(20, $items);
     }
 
+    public function testCanAppendParametersToMedia()
+    {
+        $response = new Response(200, [], json_encode([
+            'data' => [],
+            'meta' => [],
+        ]));
+
+        $client = new Client();
+        $client->addResponse($response);
+
+        $instagram = new Instagram('jerryseinfeld', $client);
+        $instagram->media([
+            'count' => 22,
+            'min_id' => 'min id',
+            'max_id' => 'max id',
+        ]);
+
+        $request = $client->getLastRequest();
+
+        $this->assertSame(
+            'access_token=jerryseinfeld&count=22&min_id=min+id&max_id=max+id',
+            $request->getUri()->getQuery()
+        );
+    }
+
     public function testSelf()
     {
         $response = new Response(200, [], json_encode([
@@ -59,29 +84,20 @@ public function testSelf()
         $this->assertIsObject($user);
     }
 
-    public function testCanAppendParametersToMedia()
+    public function testComments()
     {
         $response = new Response(200, [], json_encode([
-            'data' => [],
+            'data' => range(1, 5),
             'meta' => [],
         ]));
 
         $client = new Client();
         $client->addResponse($response);
 
         $instagram = new Instagram('jerryseinfeld', $client);
-        $instagram->media([
-            'count' => 22,
-            'min_id' => 'min id',
-            'max_id' => 'max id',
-        ]);
-
-        $request = $client->getLastRequest();
+        $comments = $instagram->comments('media-id');
 
-        $this->assertSame(
-            'access_token=jerryseinfeld&count=22&min_id=min+id&max_id=max+id',
-            $request->getUri()->getQuery()
-        );
+        $this->assertIsArray($comments);
     }
 
     public function testError()